Jason Segel, star of the hit series "How I Met Your Mother" recently revealed that he was forced to lose weight. Segel's new slim figure can be seen in his latest movie, "The Five-Year Engagement."

"I was forced to lose weight for this movie," Segel explained to David Letterman on "Late Night" yesterday. "I was told that it had to be conceivable that Emily Blunt would ever choose me to be her husband. Which is fair."

According to Segel, Ron Meyer, the president of Universal Pictures is the man behind the forced weight loss.

So how did Segel get his rocking new body? "They sent a trainer to set," said Segel, who worked out twice a day. Besides exercise, diet was also a key issue, with the trainer monitoring what Segel ate throughout the day.

Follow us   Follow @IBTimesUK

The comedic actor had a couple tricks up his sleeve though. "What they didn't anticipate was, I'm very clever, and I play a chef in the movie, so there were a lot of scenes where I had to eat," explained Segel. "So I would pay my co-stars nominal amounts of money to mess up their lines in the scenes so I would get to keep eating."

While the actor didn't seem too pleased about the forced weight loss, the summer is quickly approaching and he has Michelle Williams to start pleasing now.

The pair was caught together at the Tribeca Film Festival premiere of "The Five-Year Engagement," but according to the New York Post, refused to be photographed together. That doesn't mean that the new couple hasn't been displaying some PDA. Segel and Williams were caught at the MoMA after party holding hands and being flirty.

According to People magazine, the couple met through Segel's former "Freaks and Geeks" costar, Busy Phillips. "I've never seen her happier," a source told the magazine about Williams new relationship.

Segel seems to be happy as well, asking his followers on Twitter on March 5, "If I fell in love would you guys be happy?"