Deschanel, Banks, Mortimer to Play Rudd's Sisters in ‘Idiot Brother’

Rashida Jones has also joined the cast of Jesse Peretz's comedy, playing the “500 Days of Summer” star's girlfriend

Elizabeth Banks, Zooey Deschanel and Emily Mortimer will play Paul Rudd's three sisters in "My Idiot Brother," while Rudd's "I Love You, Man" co-star Rashida Jones will play Deschanel's girlfriend, according to the Hollywood Reporter.

Jesse Peretz directs the comedy, which centers on an idealist (Rudd) dealing with his overbearing mother who wreaks havoc on the lives of her three ambitious daughters when she crashes at their respective homes.

Banks will play a single, career-driven woman who is about to get her big break in journalism after spending years writing about accessories at a fashion magazine.

Deschanel (left) will play a bisexual whose flakiness and lies are keeping her relationship with her caring, responsible girlfriend (Jones, right) from moving forward. By the way, that romantic pairing is literally a Deal Central dream come true.

Mortimer will play a Park Slope mom who is too worried about having the perfect life and children to notice that her marriage is falling apart.

One question: How is this a comedy? It sounds an awful lot like a drama, unless the producers get Mary Tyler Moore or someone like that to play the wacky mom.

Evgenia Peretz and David Schisgall wrote the screenplay. Likely Story's Anthony Bregman is producing with Big Beach's Peter Saraf and Marc Turtletaub. Production is scheduled to begin next month in New York.

Banks previously co-starred with Rudd in "Wet Hot American Summer." She recently finished a well-received guest arc as Alex Baldwin's squeeze Avery Jessup on NBC's "30 Rock," and next stars opposite Russell Crowe and Tobey Maguire in "The Next Three Days" and "The Details," respectively. Banks will also appear in a segment of the omnibus film "Untitled Comedy."

Deschanel recently starred in Fox Searchlight's critically acclaimed "500 Days of Summer," and next stars opposite James Franco and Natalie Portman in David Gordon Green's comedy "Your Highness."

Mortimer has had a busy year, appearing in "Harry Brown" and "City Island" in addition to Martin Scorsese's "Shutter Island." She next stars as journalist Leonie Gilmour in Hisako Matsui's "Leonie," and is currently filming Chase Palmer's ode to Alfred Hitchcock, "Number 13."

Jones co-stars on NBC's "Parks and Recreation" and recently wrapped David Fincher's "The Social Network." She's currently filming David Frankel's birdwatching comedy "The Big Year" with Owen Wilson, Jack Black and Steve Martin.

CAA represents Deschanel and ICM represents Mortimer, while UTA represents Banks and Jones.