Jennifer Aniston's Wedding Dress: Everyone Wants to Know What She Wore!

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No one can figure out what Jennifer Aniston wore when she married Justin Theroux!

A new lead suggested the Friends star may have worn this $8,400 Mark Zunino gown, from the designer's 2014 bridal collection, as it was mentioned in an April clip from Say Yes to the Dress as having been selected for Aniston. (The clip was posted by TMZ.)

WATCH: Jennifer Aniston's Two Weddings -- How Her Nuptials to Justin Theroux and Brad Pitt Compare

Mark Zunino

However, ET has learned that the dress was not ultimately worn by Jennifer in the wedding ceremony.

"I did sketches for her, she had one of my gowns," Mark revealed to ET, "but ended up wearing another designer."

Aww, but that dress is so pretty!

Last week, everyone thought the mystery might have finally been solved, when a Facebook fan page for the actress uploaded this picture:

Some believed Aniston was the person wearing the dress in the photo, although that theory was quickly debunked.

WATCH: Inside Jennifer Aniston and Justin Theroux's Wedding: The Guests, the Secret Performance & More

It seems like we may never know what Jennifer wore!

One person who does know is Ellen DeGeneres, who spoke to ET at the D23 Expo over the weekend about Jennifer and Justin's big day.

"All of it was amazing," she said. "Jimmy Kimmel was hilarious and Sia sang and that was fantastic. It was just a fun night. It was a beautiful night."

PHOTOS: Celebs Who Had Secret Weddings

"I love them both and they're both great people and deserve the happiness," she added.

Justin just returned from the couple's Bora Bora honeymoon on Monday, wearing his wedding ring.

While out in paradise, Justin celebrated his 44th birthday. He and Jennifer, 46, were joined by some of their famous friends, including Jason Bateman, his wife Amanda Anka, Tobey Maguire, his wife Jennifer Meyer and Jimmy Kimmel.

WATCH: Ellen DeGeneres Talks Jennifer Aniston and Justin Theroux's Wedding: 'It Was a Beautiful Night'

Watch below.

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