Big Bang Theory Casts Alphas Star as Penny's New [Spoiler] - Should Leonard Be Worried?

The Big Bang Theory Season 6 CastThe Big Bang Theory is getting chummy with an Alphas star.

Ryan Cartwright is headed to the CBS sitcom this fall as Penny’s new pal, per The Hollywood Reporter.

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Turns out, the aspiring actress will go back to school this season (Thursdays, 8/7c) and will befriend a few of her classmates — including Cartwright’s character — along the way. Leonard, however, won’t be too fond of his girlfriend’s new guy friend.

In addition to his current role on Alphas, Cartwright has enjoyed lengthy arcs on both Bones and Mad Men.