Exclusive: Alison Brie, Lizzy Caplan, Martin Starr, Geoffrey Arend and Mark Weber are toplining indie romantic comedy “Save the Date,” produced by Gary Gilbert and Jordan Horowitz (“The Kids Are All Right”) for Gilbert Films.

Mike Mohan is directing with shooting planned for July in Los Angeles.

Written by Jeffrey Brown, Mohan and Egan Reich, story focuses on two sisters — one who’s happy with the status quo and doesn’t see any reason to marry her musician boyfriend while the other’s obsessed with planning her upcoming wedding. The script is based on characters created by indie graphic novelist Brown, whose autobiographical novels often detail his failed relationships.

Horowitz met Mohan last year at Sundance, where Mohan was promoting his film “One Too Many Mornings.” Horowitz discovered that Mohan and his wife, unbeknownst to one another, had separately hired Brown to create personalized artwork which they then exchanged on their wedding day.

Brie, the “Community” and “Mad Men” star, is currently shooting “Five-Year Engagement” for Universal and was last seen in “Scream 4.”

Caplan was last seen in “127 Hours.” Starr has been in “Mad Love” and “Hawaii Five-O” along with “Adventureland” and “Knocked Up.”

Mohan is repped by ICM; Caplan is repped by CAA and Mosaic, Brie is repped by UTA, Vital Management Group and Bloom Hergott Diemer Rosenthal Laviolette & Feldman, Starr is repped by UTA, Anonymous Content, and Morris Yorn Barnes and Levine; Arend is repped by UTA and Untitled; Weber is repped by Innovative Artists.