"How I Met Your Mother" star dishes on finale

For six seasons, Alyson Hannigan has starred in the CBS hit show "How I Met Your Mother."

The actress is perhaps best known for her witch character on the TV show "Buffy the Vampire Slayer" and her surprising vixen persona in the classic teen movie "American Pie."

These days she says she loves going to work. Hannigan stars with Neil Patrick Harris, Josh Radnor, Jason Segel and Cobie Smulders on the sitcom.

Hannigan told co-anchor Erica Hill the cast is a family.

"I know everybody says that but mostly they're talking about their functional family and this is not like that," she said. "This is actually a healthy-we-actually-chose-each-other family."

Hill noted in the new issue of Entertainment Weekly magazine, the writers have noticed the show has reinvented itself in the sixth season.

Hannigan said the show has hit its stride once again.

"(We) got back to what the fans love about it, and the heart of the show, and it's just so nice to be able to make you laugh but also make you cry."

But what's next for the show?

Hannigan hinted at a wedding.

"This season's finale, you'll definitely get more of a piece of that puzzle and you'll get some more stuff," she said. "There's some big -- they never disappoint on the season finales."

Hill said, "Good. So there will be a healthy dose of information with a healthy dose of frustration, just what we want."

What about a baby?

"Well you'll get a piece of that puzzle as well," Hannigan said.

In real life, Hannigan has a baby of your own - now 2-year-old Satyana. Hannigan takes her daughter to the set with her. She said the CBS set is like "Kidville."

But could Hannigan see her daughter doing something in show business?

"No, no, no," she said.

"I'm scared," she said. "She's very expressive and funny but we're going to try to hold it off as long as possible. I want her to just be a real kid."

Hannigan has also teamed up with StubHub, the world's largest ticket marketplace to launch a national charity program called Mom's Night Out. The program is designed to encourage moms to take a night off with their friends to attend one of 17 summer events ranging from baseball games to rock concerts. A portion of proceeds from all ticket sales to the designated events will be donated to Adopt-A-Classroom, a nonprofit organization dedicated to supporting teachers and ensuring all children have equal access to a quality education.

"Teachers are so important," Hannigan said, "Moms and teachers are the most important jobs really. In my opinion - and doctors. Anyway."

Hannigan also discussed the latest "American Pie" reunion installment - it's number four in the franchise - coming out 12 years after the original movie.

Hannigan says she didn't imagine the movie would become such a hit.

"It was a small, little, 'hey this is a cute script' and it became this huge franchise, and even after the third one, we were like 'this is probably it. It's a trilogy. That sounds good,' and here we are. We're like becoming the 'Police Academies' or something."

Catch "How I Met Your Mother" Monday nights at 8/7c on CBS.