Jennifer Lopez Set for Lionsgate’s ‘What to Expect When You’re Expecting’

The pop diva will star alongside Cameron Diaz in the romantic-comedy adaptation of the bestselling pregnancy guide

Jennifer Lopez has signed on to play a woman who wants to adopt a baby in Lionsgate's romantic comedy adaptation of "What to Expect When You're Expecting," the studio announced Friday.

Cameron Diaz also stars in the ensemble, which will be directed by Kirk Jones ("Waking Ned Devine," "Nanny McPhee").

"What to Expect When You're Expecting" is based on Heidi Murkoff's pregnancy manual, a New York Times bestseller for more than 500 weeks. Heather Hach wrote the screenplay adaptation after selling it as a pitch in a fierce bidding war. Shauna Cross rewrote.

Lionsgate plans to release the movie on Mothers Day weekend 2012.

Mike Medavoy, Arnie Messer and David Thwaites are producing, with Doug McKay co-producing, through their Phoenix Pictures.

The movie tells four related stories. Lopez's arc focuses on Holly, who has difficulty conceiving a child with her husband and wants to adopt a baby from abroad.

Also Read: Kirk Jones to Direct Adaptation of 'What to Expect When You're Expecting"

Lopez's last movie was "The Back-Up Plan," released in April 2010. Since then, she revitalized her career by becoming a judge on "American Idol."

She also plays the voice of Shira in Twentieth Century Fox's animated "Continental Drift," now in production.

"What to Expect When You're Expecting" begins filming this summer.