Whitney Port Making Acting Debut With Cameron Diaz, Jennifer Lopez!

Like her former Hills costars Audrina Patridge and Heidi Montag, Whitney Port has big screen aspirations.

The 26-year-old Whitney Eve fashion designer has joined the cast of Lionsgate's What to Expect When You're Expecting, Us Weekly has confirmed. The A-list cast includes Cameron Diaz, Jennifer Lopez, Matthew Morrison, Brooklyn Decker, Elizabeth Banks, Dennis Quaid, Chace Crawford, Joe Manganiello, Anna Kendrick, Chris Rock, Cheryl Cole and Rodrigo Santoro.

"She is playing herself. She will be in one scene with one line," a source tells Us. "She isn't a big part of the movie. [NBA player] Dwyane Wade is also in that scene playing himself."

Based on the non-fiction book of the same name, What to Expect When You're Expecting follows five couples who "suffer the many joys of the childbirth process."

Below: Whitney was spotted on the set of 'What to Expect when You’re Expecting' in Atlanta, GA on August 29, 2011.