A huge detail of Jennifer Aniston and Justin Theroux's wedding may have been accidentally revealed… months ago!

Four months before Jen, 46, and Justin, 44, tied the knot in a secret backyard ceremony on Wednesday, Aug. 5, a bridal consultant on TLC's hit show Say Yes to the Dress may have accidentally revealed the dress the actress wore to her nuptials.

jennifer aniston wedding dress

The dress rumored to be worn by Jen at her wedding on 'SYTTD.' (Photo Credits: R/R)

"I know the dress really well. I actually picked this for Jen Aniston to wear on her wedding day. In my head this is Jennifer Aniston’s dress," Kleinfeld Bridal consultant Antonella told a bride-to-be trying on a Mark Zunino gown during the April episode.

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The stunning white dress — worth $8,400 — is made of silk crepe and lace features a flattering illusion neckline, cap sleeves and a chapel-length train.

jennifer aniston and justin theroux

Jennifer and her husband, Justin.

"We can neither confirm nor deny that we designed the gown for Jennifer Aniston's special day. We can confirm that we did do sketches of wedding dress options for her," a representative for Mark Zunino told The Daily Mail of the potential slip-up.

Jen and Justin — who first started dating in May 2011 and became engaged in August 2012 — exchanged vows in front of 70 guests at their Bel Air mansion in early August. Following their wedding, the couple jetted off to Bora Bora for a lavish honeymoon with a group of close friends.

Watch the Say Yes to the Dress clip in the video below!

https://www.youtube.com/watch?v=VAyfUSRufsU