Jason-Segel-Josh-Radnor-Alyson-Hannigan-How-I-Met-Your-Mother.jpgDuring a scene for the new season — starting with two episodes on Monday, Sept. 19 — of CBS’ “How I Met Your Mother” being shot in late August, Barney (Neil Patrick Harris) is rather inappropriately impressed at the sight of pal Lily’s (Alyson Hannigan) expanding chest, the result of her pregnancy (announced at the end of last season).

After the scene wraps, Hannigan drops by to talk to Zap2it, admitting, “It’s all padding.”

But pregnancy isn’t an unusual condition for Hannigan, who had a daughter, Satyana Marie, with husband Alexis Denisof on March 24, 2009, also Hannigan’s 35th birthday.

“I’ve been there, done that,” she says of Lily’s impending motherhood. “It’s like I’ve done my homework.”

Hannigan met Denisof on the set of “Buffy the Vampire Slayer,” but they didn’t date until they had been friends for a while.

Of course, Hannigan credits “Buffy” and “Angel” executive producer Joss Whedon for her meeting Denisof but also gives a nod to one of her “Buffy” co-stars.

“We, of course, thank Joss,” she says, “but we owe a lot to Anthony Stewart Head, because he — I was actually there for the conversation he had with Joss — when we knew there was going to be a new Watcher, Tony was saying to Joss, ‘I know this guy, Alexis, who’d be great for that role.’ So they brought him in, because Tony actually put in a word.

“But then, he balanced it out. That was a good deed, and then when — Alexis and I were friends for a long time first — then I came to Tony and said, ‘Do you think Alexis and I should try dating?’, he was like, ‘Absolutely not. It’s a terrible idea. Don’t risk the friendship. You guys are too good as friends. You shouldn’t mess that up.’

“Then he talked to his girlfriend, and she was, like, ‘Absolutely. You’re crazy. They’re wonderful.’ The next day, he came back and said, ‘All right, Sarah said you should.'”

Asked how TV husband Marshall (Jason Segel) will likely handle the pregnancy as compared to her real-life spouse, Hannigan laughs and says, “Oh, God, than my real husband? My real husband was awesome. Nobody could top my husband, especially somebody on a sitcom.

“He was, like, beyond, beyond, super-dad, super-husband, super-man, definitely.”

But you don’t have to be married or a parent to enjoy “How I Met Your Mother,” which chronicles, from the future, bachelor Ted’s (Josh Radnor) search for his true love/baby mama.

“It’s just everything,” says Hannigan. “What I’ve always loved about the show, it definitely has the humor, the raunchiness that a ‘Two and a Half Men’ would have, but it has so much heart. It also just shows everything.

“Everybody knows a Barney; Everybody knows a Marshall and Lily. Everybody’s looking for a Ted.”

Posted by:Kate O'Hare