With recycling bins in place at "How I Met Your Mother," "The set is actually very green," reports Jason Segel. "I recycle at home, too," says the actor, who begins his seventh season on the CBS sitcom Sept. 19. His character Marshall's wife Lily (Alyson Hannigan) is pregnant this season, which he says is a natural development and reflective of what the show's writers are personally experiencing. "They write what's happening in their lives. It's what people our age are going through, and that's what the show's about."

"HIMYM" is Segel's longest-running TV series, having previously appeared in the cult favorites but short-lived "Freaks & Geeks" and "Undeclared." "I thought both of those shows were brilliant, so I removed the notion of success and longevity from quality. With that in mind I didn't know what to expect with this. The fact that we're now seven years in, it's longer than any relationship I've had. It's longer than I went to any school. Aside from my family this is the longest that I've known any group of people."

He plans to stick with it "as long as it feels great and fresh and as lively as it does. Last year they gave me my father dying. I had to do scenes of losing my father and I was scared to do them. And that was a very exciting thing. It made me want to do the show forever. I like to do things that make me scared a little bit. I want to feel challenged," he says, and his next movie did just that.

He stars in and wrote the script for "The Muppets," which "was more complicated than I thought. When you write a scene like 'the Muppets run away from a building' everything has to be elevated, there are puppeteers operating all four limbs, who of course have to be invisible. You don't ever want to notice them," says Segel, who admits to tearing up the first time he heard Kermit the Frog speak a line of dialogue to him. "It was emotional. He's been my favorite since I was a little kid." The movie hits theaters Nov. 23.

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