Big Bang Theory

Are 'Big Bang Theory's' Leonard and Penny getting engaged?

Jan. 15, 2013 at 9:03 PM ET

Michael Yarish / CBS /
Johnny Galecki teases that an engagement might on the way for Penny (Kaley Cuoco) and Leonard.

Could Leonard and Penny boldly be going where only one of "The Big Bang Theory's" lovable nerds has gone before and getting engaged?

The on-again, off-again couple -- who recently took their relationship to the next level when Penny (Kaley Cuocofinally professed her love for Leonard -- could be considering the idea, according to co-star Johnny Galecki. 

"Next week we start shooting the Valentine's Day episode," the actor behind Leonard tells The Hollywood Reporter. "It's a big one for Leonard and Penny -- there might be somebody getting down on one knee."

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Galecki said the February episode, airing coincidentally on Feb. 14, would be in the vein of the widely popular Christmas episode in which Penny gifts a napkin autographed by "Star Trek's" Leonard Nimoy (and containing his DNA!) to Sheldon (Jim Parsons), resulting in a rare display of affection.

"We never started doing holiday event shows until two or three seasons in when we did the Christmas episode; that was a big hit and we struck a chord of sentimentality with our audience and we'll continue to do so," Galecki said. "The Valentine's Day episode will be that."

The fan-favorite couple has certainly been through the ringer, having split when Penny was unable to return Leonard's profession of love, reuniting in "Big Bang's" 100th episode.  

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"The ball is still in her court," Galecki said. "The last couple of seasons have really been about her emotional inabilities. It's made that character of Penny a well-rounded one and you'd assume it would always be Leonard's fault but he's been a pretty good partner to her."

As for whether or not the potential proposal is successful or not, Galecki remained mum. "I don't know if it'll work out, I'm just saying," he said with a smile.

"The Big Bang Theory" airs Thursdays at 8 p.m. on CBS.

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