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Prom 2025 is Arriving Daily!!! Text us at 484-580-9417 to book your appointment!

Call for an Appointment

610.265.7766

KING of PRUSSIA MALL

Call for an Appointment

215.702.8586

OXFORD VALLEY MALL

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    • Overview
    • Aleta
    • Alyce Paris
    • Amarra
    • Ashley Lauren
    • Colors Dress
    • Elie Wilde - OV
    • Faviana / Faviana Glamour
    • Faviana Curves
    • Formals XO Exclusives
    • Jasz Couture
    • Jessica Angel
    • Johnathan Kayne
    • Jovani Prom
    • La Femme
    • Portia & Scarlett
    • Portia & Scarlett Couture
    • Portia & Scarlett Evening
    • Portia & Scarlett Pageant
    • Portia & Scarlett Prom
    • Primavera
    • Primavera Curvy Plus
    • Scala
    • Sherri Hill
    • Stella Prom
    • Tiffany Designs
    • Tiffany Plus
    • Overview
    • Aleta Shorts
    • Alyce Semi-Formal
    • Amarra Homecoming
    • Clarisse Homecoming
    • Damas Collection by House of Wu
    • Damas de Vizcaya
    • Faviana Cocktail
    • Formals XO Exclusives Short
    • Jasz Homecoming
    • Jessica Angel Cocktail
    • Jovani Semi - Formal
    • LaFemme Semi-Formal
    • MoriLee Sticks & Stones
    • Portia & Scarlett Cocktail
    • Primavera Short
    • Scala Cocktail
    • Sherri Hill Cocktail
    • Tiffany Homecoming
    • Overview
    • House of Wu Quinceanera
    • Morilee Vizcaya
    • Portia & Scarlett Ballgowns
    • Princesa
  • Sale
  • Semi-formal dresses Langhorne Pennsylvania King of Prussia Pennsylvania
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Shop by Designer
  • JOVANI COLLECTIONS
    +
    • Jovani - Bridal
    • Jovani - Informal Wedding
    • Jovani - Couture
    • Jovani - Evenings
    • Jovani - JVN Evening
    • Jovani - Maslavi
    • Jovani Semi-Formal
    • Jovani - Pageant
    • Jovani - Prom
    • JVN Prom by Jovani
  • SHERRI HILL COLLECTIONS
    +
    • Sherri Hill Prom
    • Pearl Bridal by Sherri Hill
  • TOP 10 PROM CATALOG
    +
    • TOP 10 PROM CATALOG
  • PROM
    -
    • Aleta
    • Alyce Paris
    • Amarra
    • Ashley Lauren
    • Colors Dress
    • Elie Wilde - OV
    • Faviana / Faviana Glamour
    • Faviana Curves
    • Formals XO Exclusives
    • Jasz Couture
    • Jessica Angel
    • Johnathan Kayne
    • Jovani Prom
    • La Femme
    • Portia & Scarlett
    • Portia & Scarlett Couture
    • Portia & Scarlett Evening
    • Portia & Scarlett Pageant
    • Portia & Scarlett Prom
    • Primavera
    • Primavera Curvy Plus
    • Scala
    • Sherri Hill
    • Stella Prom
    • Tiffany Designs
    • Tiffany Plus
  • COCKTAIL/SHORT
    +
    • Aleta Shorts
    • Alyce Semi-Formal
    • Amarra Homecoming
    • Clarisse Homecoming
    • Damas Collection by House of Wu
    • Damas de Vizcaya
    • Faviana Cocktail
    • Formals XO Exclusives Short
    • Jasz Homecoming
    • Jessica Angel Cocktail
    • Jovani Semi - Formal
    • LaFemme Semi-Formal
    • MoriLee Sticks & Stones
    • Portia & Scarlett Cocktail
    • Primavera Short
    • Scala Cocktail
    • Sherri Hill Cocktail
    • Tiffany Homecoming
  • QUINCEANERA & SWEET 16
    +
    • House of Wu Quinceanera
    • Morilee Vizcaya
    • Portia & Scarlett Ballgowns
    • Princesa
  • BRIDESMAIDS
    +
    • Adrianna Papell Bridesmaids
    • Christina Wu Celebrations
    • JESSICA ANGEL COLLECTON
    • Morilee Bridesmaids
  • MOTHER of the BRIDE/GROOM
    +
    • Christina Wu Elegance
    • La Femme Evening
    • MGNY for Morilee
    • Montage
  • CLEARANCE
    +
    • Sale Gowns and Dresses
  • More Styles
    -
    • Prom Dresses
    • Glitter Fabric
    • Bridal Gowns
    • Ballgowns
    • Beaded/Sequin
    • High-Low
    • Jumpsuits/Pants (Online Only)
    • Lace
    • Mermaid
    • Plain
    • Prints
    • Plus Sizes
    • Pageant
    • Semi-Formal
    • Sleeves
    • Two-Piece

Semi-formal dresses Langhorne Pennsylvania King of Prussia Pennsylvania

Sassy, Sexy, Short! Cocktail dresses for all special occasions at Formals XO. New cocktail dress styles for Homecoming. Cocktail dresses from Mori Lee, sexy short dresses by Sherri Hill, short cocktail dresses by Jovani, Alyce Paris, and much more.
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Sophia Thomas Designs 9018

9018 Sophia Thomas Designs

 
Sophia Thomas Designs 9019

9019 Sophia Thomas Designs

 
Sophia Thomas Designs 9020

9020 Sophia Thomas Designs

 
Sophia Thomas Designs 9021

9021 Sophia Thomas Designs

 
Sophia Thomas Designs 9022

9022 Sophia Thomas Designs

 
Sophia Thomas Designs 9023

9023 Sophia Thomas Designs

 
Sophia Thomas Designs 9024

9024 Sophia Thomas Designs

 
Sophia Thomas Designs 9025

9025 Sophia Thomas Designs

 
Sophia Thomas Designs 9026

9026 Sophia Thomas Designs

 
Sophia Thomas Designs 9027

9027 Sophia Thomas Designs

 
Sophia Thomas Designs 9028

9028 Sophia Thomas Designs

 
Sophia Thomas Designs 9029

9029 Sophia Thomas Designs

 
Sophia Thomas Designs 9030

9030 Sophia Thomas Designs

 
Sophia Thomas Designs 9031

9031 Sophia Thomas Designs

 
Sophia Thomas Designs 9032

9032 Sophia Thomas Designs

 
Sophia Thomas Designs 9033

9033 Sophia Thomas Designs

 
Sophia Thomas Designs 8342

8342 Sophia Thomas Designs

 
Sophia Thomas Designs 8343

8343 Sophia Thomas Designs

 
Sophia Thomas Designs 8344

8344 Sophia Thomas Designs

 
Sophia Thomas Designs 8345

8345 Sophia Thomas Designs

 
Sophia Thomas Designs 8443

8443 Sophia Thomas Designs

 
Sophia Thomas Designs 8444

8444 Sophia Thomas Designs

 
Sophia Thomas Designs 8445

8445 Sophia Thomas Designs

 
Sophia Thomas Designs 8457

8457 Sophia Thomas Designs

 
Sophia Thomas Designs 8459

8459 Sophia Thomas Designs

 
Sophia Thomas Designs 8500

8500 Sophia Thomas Designs

 
Sophia Thomas Designs 8501

8501 Sophia Thomas Designs

 
Sophia Thomas Designs 8502

8502 Sophia Thomas Designs

 
Sophia Thomas Designs 8503

8503 Sophia Thomas Designs

 
Sophia Thomas Designs 8505

8505 Sophia Thomas Designs

 
Sophia Thomas Designs 8507

8507 Sophia Thomas Designs

 
Sophia Thomas Designs 8508

8508 Sophia Thomas Designs

 
Sophia Thomas Designs 8510

8510 Sophia Thomas Designs

 
Sophia Thomas Designs 8512

8512 Sophia Thomas Designs

 
Sophia Thomas Designs 8517

8517 Sophia Thomas Designs

 
Sophia Thomas Designs 8518

8518 Sophia Thomas Designs

 
Sophia Thomas Designs 8519

8519 Sophia Thomas Designs

 
Sophia Thomas Designs 8520

8520 Sophia Thomas Designs

 
Sophia Thomas Designs 8521

8521 Sophia Thomas Designs

 
Sophia Thomas Designs 8522

8522 Sophia Thomas Designs

 
Sophia Thomas Designs 8523

8523 Sophia Thomas Designs

 
Sophia Thomas Designs 8524

8524 Sophia Thomas Designs

 
Sophia Thomas Designs 8525

8525 Sophia Thomas Designs

 
Sophia Thomas Designs 8526

8526 Sophia Thomas Designs

 
Sophia Thomas Designs 8528

8528 Sophia Thomas Designs

 
Sophia Thomas Designs 8529

8529 Sophia Thomas Designs

 
Sophia Thomas Designs 8533

8533 Sophia Thomas Designs

 
Sophia Thomas Designs 8550

8550 Sophia Thomas Designs

 
Sophia Thomas Designs 8555

8555 Sophia Thomas Designs

 
Sophia Thomas Designs 8599

8599 Sophia Thomas Designs

 
Sophia Thomas Designs 8600

8600 Sophia Thomas Designs

 
Sophia Thomas Designs 8603

8603 Sophia Thomas Designs

 
Sophia Thomas Designs 8604

8604 Sophia Thomas Designs

 
Jessica Angel Collection 347S

347S Jessica Angel Collection

$290  
IN STOCK*
Jessica Angel Collection 299S

299S Jessica Angel Collection

$270  
IN STOCK*
Sherri Hill 55624

55624 Sherri Hill

$750  
IN STOCK*
Sherri Hill 55621

55621 Sherri Hill

$850  
IN STOCK*
Jovani Short & Cocktail 09744

09744 Jovani Short & Cocktail

$494  
IN STOCK*
Jovani Homecoming Dresses 220610

220610 Jovani Homecoming Dresses

$420  
IN STOCK*
Jovani Short & Cocktail 09696

09696 Jovani Short & Cocktail

$452  
IN STOCK*
Jovani Short & Cocktail 09899

09899 Jovani Short & Cocktail

$462  
IN STOCK*
Jovani Short & Cocktail 23064

23064 Jovani Short & Cocktail

$557  
IN STOCK*
Jovani Short & Cocktail 000212

000212 Jovani Short & Cocktail

$945  
IN STOCK*
Jovani Short & Cocktail 09718

09718 Jovani Short & Cocktail

$483  
IN STOCK*
Jovani Homecoming Dresses 37115

37115 Jovani Homecoming Dresses

$397  
Jovani Homecoming Dresses 36791

36791 Jovani Homecoming Dresses

$483  
Jovani Homecoming Dresses 22544

22544 Jovani Homecoming Dresses

$788  
Damas Quinceanera Dresses 9611

9611 Damas Quinceanera Dresses

$250  
Damas Quinceanera Dresses 9612

9612 Damas Quinceanera Dresses

$250  
Damas Quinceanera Dresses 9613

9613 Damas Quinceanera Dresses

$319  
Damas Quinceanera Dresses 9614

9614 Damas Quinceanera Dresses

$259  
Damas Quinceanera Dresses 9615

9615 Damas Quinceanera Dresses

$219  
Damas Quinceanera Dresses 9616

9616 Damas Quinceanera Dresses

$319  
Damas Quinceanera Dresses 9617

9617 Damas Quinceanera Dresses

$270  
Damas Quinceanera Dresses 9618

9618 Damas Quinceanera Dresses

$270  
Damas Quinceanera Dresses 9619

9619 Damas Quinceanera Dresses

$399  
9592

9592

$290  
9593

9593

$298  
9594

9594

$370  
9596

9596

$259  
9599

9599

$329  
9600

9600

$359  
Damas Quinceanera Dresses 9574

9574 Damas Quinceanera Dresses

$208  
Damas Quinceanera Dresses 9579

9579 Damas Quinceanera Dresses

$208  
Damas Quinceanera Dresses 9551

9551 Damas Quinceanera Dresses

$240  
Damas Quinceanera Dresses 9535

9535 Damas Quinceanera Dresses

$210  
Damas Quinceanera Dresses 9488

9488 Damas Quinceanera Dresses

$162  
Damas Quinceanera Dresses 9459

9459 Damas Quinceanera Dresses

$147  
Alyce Paris Homecoming 4705

4705 Alyce Paris Homecoming

$250  
IN STOCK*
Alyce Paris Homecoming 4728

4728 Alyce Paris Homecoming

$344  
IN STOCK*
Alyce Paris Homecoming 4791

4791 Alyce Paris Homecoming

$334  
IN STOCK*
Clarisse Homecoming 30201

30201 Clarisse Homecoming

$210  
IN STOCK*
Clarisse Homecoming 30250

30250 Clarisse Homecoming

$218  
IN STOCK*
Clarisse Homecoming 30274

30274 Clarisse Homecoming

$318  
IN STOCK*
Clarisse Homecoming 30238

30238 Clarisse Homecoming

$290  
IN STOCK*
Clarisse Homecoming 30210

30210 Clarisse Homecoming

$318  
IN STOCK*
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We provide the dress.
You provide the personality.

We want your special occasion shopping experience to be just that - an experience. Our seasoned staff requires an appointment to try on but we encourage you to stop by anytime and browse. To book an appointment, please call us at either of our locations or Text 484-580-9417

We also require ALL PROM and HOMECOMING SHOPPERS be accompanied by a parent/guardian over 25 years of age because our gowns are very delicate and may require assistance to try on. Consume your morning coffee before entering the store. We have a no food/drink policy in our store for all guests. Even spilled water can destroy a dress! Thank you for understanding!

XO

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Hours

Monday - Thursday 11-7

Friday & Saturday 10-7

Sunday 11-6

Appointments Required.

$50 Deposit for Bridesmaid and Mother's Appointments

$100 for Bridal Appointments and Ballgown Appointments

CUSTOMER SERVICE
  • Contact Us
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  • Please No Food or Drinks in the Store! Thank you
My Account
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  • Order History
  • Wish List
Locations
Oxford Valley Mall
2300 E Lincoln Hwy
Langhorne, PA 19047
Next to Macy's Upper Level
APPOINTMENT REQUIRED
(215) 702-8586
King Of Prussia Mall
160 N Gulph Rd
King Of Prussia, PA 19406
Next to L.L. Bean Upper Level
APPOINTMENT REQUIRED
(610) 265-PROM
formalsxo@aol.com
Text Us 484-580-9417
  • Prom
  • Cocktail/Short
  • Quinceañera
  • Sale
Search Only in this Category
+Price Filter:
+Search In-Stock by Size
Select up to 3 sizes
Filter for In-Store Stock


+Narrow by Feature
Occasion
Type
Feature
Back Style
Color Scheme
Embellishment
Fabric
Hemline/Train
Neckline
Silhouette
Sleeve
Straps


+Narrow by Color


Shop by Designer

JOVANI COLLECTIONS

  • Jovani - Bridal
  • Jovani - Informal Wedding
  • Jovani - Couture
  • Jovani - Evenings
  • Jovani - JVN Evening
  • Jovani - Maslavi
  • Jovani Semi-Formal
  • Jovani - Pageant
  • Jovani - Prom
  • JVN Prom by Jovani

SHERRI HILL COLLECTIONS

  • Sherri Hill Prom
  • Pearl Bridal by Sherri Hill

TOP 10 PROM CATALOG

  • TOP 10 PROM CATALOG

PROM

  • Aleta
  • Alyce Paris
  • Amarra
  • Ashley Lauren
  • Colors Dress
  • Elie Wilde - OV
  • Faviana / Faviana Glamour
  • Faviana Curves
  • Formals XO Exclusives
  • Jasz Couture
  • Jessica Angel
  • Johnathan Kayne
  • Jovani Prom
  • La Femme
  • Portia & Scarlett
  • Portia & Scarlett Couture
  • Portia & Scarlett Evening
  • Portia & Scarlett Pageant
  • Portia & Scarlett Prom
  • Primavera
  • Primavera Curvy Plus
  • Scala
  • Sherri Hill
  • Stella Prom
  • Tiffany Designs
  • Tiffany Plus

COCKTAIL/SHORT

  • Aleta Shorts
  • Alyce Semi-Formal
  • Amarra Homecoming
  • Clarisse Homecoming
  • Damas Collection by House of Wu
  • Damas de Vizcaya
  • Faviana Cocktail
  • Formals XO Exclusives Short
  • Jasz Homecoming
  • Jessica Angel Cocktail
  • Jovani Semi - Formal
  • LaFemme Semi-Formal
  • MoriLee Sticks & Stones
  • Portia & Scarlett Cocktail
  • Primavera Short
  • Scala Cocktail
  • Sherri Hill Cocktail
  • Tiffany Homecoming

QUINCEANERA & SWEET 16

  • House of Wu Quinceanera
  • Morilee Vizcaya
  • Portia & Scarlett Ballgowns
  • Princesa

BRIDESMAIDS

  • Adrianna Papell Bridesmaids
  • Christina Wu Celebrations
  • JESSICA ANGEL COLLECTON
  • Morilee Bridesmaids

MOTHER of the BRIDE/GROOM

  • Christina Wu Elegance
  • La Femme Evening
  • MGNY for Morilee
  • Montage

CLEARANCE

  • Sale Gowns and Dresses

More Styles

  • Prom Dresses
  • Glitter Fabric
  • Bridal Gowns
  • Ballgowns
  • Beaded/Sequin
  • High-Low
  • Jumpsuits/Pants (Online Only)
  • Lace
  • Mermaid
  • Plain
  • Prints
  • Plus Sizes
  • Pageant
  • Semi-Formal
  • Sleeves
  • Two-Piece