Dave Franco's Fiancé Accidentally Peed On Her Costume While Filming? Watch Alison Brie Re-Tell Incident

Dave Franco's fiancé, Alison Brie may be playing a Type-A personality on her new film, "How To Be Single" but in real life, she can be a little crazy and candid. [Watch interview below].

During her appearance on "Late Night With Seth Meyers," the starlet revealed a slight costume malfunction on the set of "Made Men," which forced her to pee on her vintage undergarments.

Alison Brie revealed that she had to wear a girdle as part of her costume, a set of undergarments equivalent to today's Spanx.

"Basically, you're supposed to wear it like underwear. You're not supposed to wear modern underwear underneath it," Brie explained to Seth Meyers.

One day, Brie realized she had to pee on the way to the set, already in full costume. When she got to the bathroom, she explained having to grope around to get out of the girdle.

"And I started peeing and I can't hear the pee hitting the toilet and I realized I missed my underwear and I didn't quite make it out of the way and I just did a full pee," Brie said, as the audience laughed. "I just got very warm, just soaked!"

"There was no time so I sort of pat it down with toilet paper," she added. "So I just went to the set and shot a full scene."

The "Mad Men" star revealed she didn't know until a season and a half later that you were not supposed to wear underwear while wearing a girdle.

Just recently, Alison Brie revealed she might wear a dress she only bought online for her upcoming wedding with fiancé, Dave Franco.

"I'm not very bridal, instinctually," Brie told Yahoo Style. "Marriage never really interested me, I guess because I was very focused on my work. I wasn't sure if I really saw the point to it. I bought a dress on Net-a-Porter, and I'm like, 'Maybe I'll wear that.'"

"We're very mellow about the whole thing," Alison Brie said of her engagement with Dave Franco. "We're like, it's gonna happen we'll figure it out. We'll get there!"