As previously reported, Laura Prepon, of That 70's Show fame, will be guest starring on How I Met Your Mother. Look for her to appear on a five-episode arc as Ted's former college girlfriend, Karen. 

Thus far, we know Karen is snooty, cheated on Ted to end the relationship, and that Marshall and Lily hate her.

Thanks to CBS, here's a first look at the actress as Karen, as these four stills are courtesy of the upcoming March 9 episode titled, "Sorry, Bro." 

Click to enlarge each picture:

Photo Credits: © 2009 CBS Broadcasting Inc.  Author: Sonja Flemming

Eric Hochberger is the programmer of TV Fanatic, so please forgive his mediocre writing. His programming is far better. Follow him on Twitter and/or email him. Just don't request threaded comments. They're coming.