The guest stars on HBO's hit comedy Californication next season range from rocker Rick Springfield to Gossip Girl's own Ed Westwick, according to reports.

In the comedy's third season season, main character Hank (David Duchovny) becomes a university prof. Ed Westwick will play a student fascinated by vampire literature and will appear in the second episode of the season. Should be fun!

Although we doubt he'll be dressed like this ...

Singer and former soap star Rick Springfield will also guest star, while Eva Amurri will play another of Hank's students, and Embeth Davidtz (of HBO's In Treatment) will portray the wife of the dean of students (Peter Gallagher of The OC).

Kathleen Turner and Diane Farr also will guest star in the comedy, which will offer 12 episodes starting this fall. Looking forward to seeing Ed Westwick on it!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.