Judy Greer has nabbed another high profile guest-starring role.

The hilarious actress, most recently seen as an ex of Phil's on Modern Family, will appear in a May sweeps episode of The Big Bang Theory. Michael Ausiello reports that her character will spend a night with Sheldon (!).

Greer will portray a famous physicist on the sitcom. Says executive producer Bill Prady: “Sheldon invites her to stay over at the apartment.”

Can you blame the guy?

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