Alyson Hannigan

Aside from some humorous moments during his time on "Buffy the Vampire Slayer" and "Angel," Alexis Denisof hasn’t had much chance to do comedic work.

That will soon change, as Denisof is joining his wife, Alyson Hannigan, for a couple of episodes of Hannigan’s CBS sitcom, "How I Met Your Mother."

"He actually just did an episode of our show. It was so much fun," Hannigan told reporters recently during interviews for her film "Date Movie," which opens nationally Friday. She won’t reveal who Denisof is playing on the show but does allow that "it’s very funny and, actually, he’s coming back for the next episode as well."

Hannigan and Denisof, who met when he joined the "Buffy" cast in the show’s third season, have been married since October 2003.

"How I Met Your Mother" is also Hannigan’s first regular role in a TV comedy, although most of her movie work has been comedic. She says she’s enjoying the camaraderie she shares with the cast, which also includes Josh Radnor, Cobie Smulders, Jason Segel and Neil Patrick Harris.

"I was actively looking for a half-hour (show) because of the family aspect of television, going to work with the same people for the majority of the year and getting to do what I love to do," she says.

She’s also hopeful that the series will earn another year on CBS; thus far this season, it’s drawing about 10.3 million viewers per week, along with fairly positive reviews.

"We’re so lucky. We’re having such a blast," Hannigan says.

"We just hope we get to come back next year," Hannigan adds.

"They have to see all their pilots and make sure that, you know. . . . It would be shocking, I think" if the show isn’t renewed.