The House Bunny (2008)

The House Bunny is a 2008 romantic comedy film directed by Fred Wolf, written by Kirsten Smith and Karen McCullah Lutz, and starring Anna Faris as a former Playboy bunny who signs up to be the "house mother" of an unpopular university sorority after being conned by a rival into believing she is now too old by Playboy standards.

More at Wikipedia.

Cast:

• Matt Barr
• Owen Benjamin
• Allen Covert
• Beverly D'Angelo
• Kat Dennings
• Anna Faris
• Dana Goodman
• Colin Hanks
• Hugh Hefner
• Matt Leinart
• Holly Madison
• Kimberly Makkouk
• Bridget Marquardt
• Monet Mazur
• Christopher McDonald
• Katharine McPhee
• Shaquille O'Neal
• Dan Patrick
• Tyson Ritter
• Rachel Specter
• Emma Stone
• Nick Swardson
• Sara Jean Underwood
• Kendra Wilkinson
• Kiely Williams
• Rumer Willis
• Sarah Wright