Jason is known for his role as “Freak” Nick Andopolis on the short-lived NBC comedy-drama series Freaks and Geeks, about a group of suburban Detroit high school students circa 1980. He also personally wrote a song for his character, Nick, to sing to the lead female character, Lindsay (Linda Cardellini), in an episode of Freaks and Geeks. She and Segel dated for a few years following the show’s cancellation. It was rumored that she dumped him for gaining twenty pounds, but it has since emerged that the statement was in fact a joke taken out of context.

Segel had recurring roles on CSI: Crime Scene Investigation as Neil Jansen and on Undeclared as Eric. He currently plays Marshall on the CBS sitcom How I Met Your Mother, a role which earned him a Ewwy nomination for Best Supporting Actor in a Comedy Series in 2009. Feature film appearances include Slackers, SLC Punk!, The Good Humor Man, and Dead Man on Campus. In 2007, he appeared in Knocked Up, directed by Freaks and Geeks producer Judd Apatow. Segel starred in the lead role of 2008′s Forgetting Sarah Marshall, a film he wrote and Apatow produced, with Shauna Robertson, for Universal Pictures. His most recent film I Love You, Man was released on March 20, 2009 by Dreamworks.

Segel, along with Nicholas Stoller, has recently been enlisted by Disney to write and direct the next Muppets film. In Forgetting Sarah Marshall Segel’s character writes a “Dracula” musical performed by puppets. In an interview with Opie and Anthony, when they were on 104.1 WBCN in Boston, he stated the Dracula musical with puppets, as well as being broken up with while naked, were real experiences he wrote into the movie. Those cloth creatures were custom-made by the Henson puppeteers, and the experience emboldened Segel to pitch his concept for a Muppets movie.