When they were not busy designing clothes for their fashion labels The Row or Elizabeth and James, Mary-Kate Olsen and Ashley Olsen decided to make a wedding dress for their good friend.

The twins helped to design a custom gown for their longtime pal Molly Fishkin's in time for her nuptials to director and producer Asher Levin.

According to E! News, Fishkin told Vogue, "Designing my gown with them was the most exciting and emotional experience of my life, and I will never forget what they did for me."

She continued, "They are very close friends of mine and have been for the last 15 years," adding, "The minute I got engaged, they said they would love to design my wedding dress. I was thrilled-their taste is impeccable, and I really trust them. Their team was so incredible and patient with me."

The 28-year-old designers' gown creation featured a scalloped neckline, long sheer sleeves and head to toe lace.

The bride's wedding photographer, Heather Kincaid said, "The detail of the dress was incredible," adding, "The full dress and the veil were all created of the same gorgeous lace and the construction was striking. The lining of the dress was just as lux."

Naturally Fiskin was in awe by the gown created by the Olsen twins. Kincaid revealed, "The bride commented a few times on how comfortable she was in the dress.

"Being made specifically for her, it fit her perfectly and you could tell that it made her feel so beautiful, which as the photographer made it so easy to photograph."

Their friend's gown may just be the beginning as Mary-Kate Olsen teased back in May that she may design her own wedding dress for her upcoming nuptials to fiancé Olivier Sarkozy.