Katie LeClerc

Switched at Birth star Katie LeClerc will guest-star in The Big Bang Theory, EW reports.

The actress, who is hearing-impaired on both Switched and in real life, will play Emily, a friend of Penny's who is deaf and a potential love interest for awkward, girlfriend-less Raj, according to the site.

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LeClerc will turn up in the fourth episode of the new season, airing Oct. 6.

Season 5 of Big Bang Theory premieres Thursday, Sept. 22 at 8/7c. Switched at Birth returns from its first-year hiatus early next year.