By Jeff Sneider and Lucas Shaw
LOS ANGELES (TheWrap.com) - "Dredd" star Olivia Thirlby is set to join Kevin Hart and Josh Gad in the untitled comedy that Jeremy Garelick will direct for Screen Gems and Miramax, an individual familiar with the project has told TheWrap.
Hart stars as Jimmy, who provides best-man services for socially challenged grooms who have no close friends willing to stand by them on their wedding day.
Gad will play Doug, a groom-to-be who fabricates not just his best man, but his nine groomsmen as well. Together they must carry out a charade that is designed to make Doug look his best but threatens to destroy everything if it fails.
Kaley Cuoco ("The Big Bang Theory") will play Gad's self-centered fiancee, while Affion Crockett will play one of the fake groomsmen.
Thirlby will play Cuoco's sister who develops a crush on Hart's character.
Project, which is currently untitled, was formerly known as "Best Man Inc." when it was developed at Miramax. Garelick wrote the script with Jay Lavender.
Will Packer ("Think Like a Man") is producing with Miramax's Adam Fields. Screen Gems president Clint Culpepper is overseeing the project on behalf of the studio.
Thirlby recently starred in "Dredd," "Being Flynn" and the indie drama "Nobody Walks." She recently wrapped the indies "Red Knot" with Vincent Kartheiser and "5 to 7″ with Anton Yelchin.
She's represented by CAA and 3 Arts Entertainment.