Aw, we want to be a part of this cast! They look like they're having so much fun! Co-stars James Marsden, Lizzy Caplan, Kirsten Dunst and Isla Fisher goofed around during a portrait session at the 2012 Sundance Film Festival on Sunday in Park City, Utah.

OK! GALLERY: JAMES MARSDEN WALKS THE SNOWY STREETS AT SUNDANCE

The group stars in the new film Bachelorette, along with Hayes MacArthur, Rebel Wilson and Kyle Bornheimer.

The cast posed at the T-Mobile Village at the Lift in a cozy gathering on the floor.

OK! GALLERY: LIV TYLER & JAMES MARSDEN GET GOOFY FOR ROBOT & FRANK IN UTAH

The film centers on three friends (Lizzy, Kirsten and Isla) who are asked to be the bridesmaids at the wedding of a former high school classmate (Rebel) they used to tease.