Danica McKellar to Guest Star on The Big Bang Theory

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When Katee Sackhoff guest-starred a couple weeks ago on The Big Bang Theory, the CBS show enjoyed its highest ratings of all-time.

With that in mind, the pressure is on Danica McKellar.

The former Wonder Years star - who played Kevin’s longtime girlfriend, Winnie Cooper - has actually grown into a best-selling author of math books. Therefore, is there a better sitcom on which for her to guest star than this one?

She'll appear on the January 11 episode.

Danica McKellar

“I play Abby, a grad student at Cal Tech," McKellar said. "She's the love interest for one of the characters.”

The actress has appeared on a pair of How I Met Your Mother episodes over the last few years. In the interest of full disclosure, I was madly in love with her when I was 13.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.