Matthew Morrison has signed on (along with seemingly everybody else in town) for Lionsgate’s What to Expect When You’re Expecting, the adaptation of the bestselling pregnancy guidebook. The Glee star will play Evan, who teams with Cameron Diaz’s character on a celebrity dance show and eventually teams on a pregnancy, forcing them to re-evaluate what’s important in life. Chace Crawford and Rob Heubel also have recently joined the cast, which includes Diaz, Jennifer Lopez, Brooklyn Decker, Elizabeth Banks, Anna Kendrick and Chris Rock. Shooting begins this summer on the ensemble romantic comedy ahead of a May 11, 2012 release. Kirk Jones is directing. Morrison, now on tour to promote his self-titled album while on a break from Fox’s Glee, is repped by CAA and manager Eric Podwall.