Gretchen, who is played by Kaley's sister Briana, is dating Penny's ex-boyfriend.
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Gretchen is a friend or former friend of Penny. She is seen in "The Tangible Affection Proof...
This guy is an ex-boyfriend of Penny and the fiancé or now-husband of Penny's friend or former...
Minor characters or various individuals that come through The Big Bang Theory universe. Noel De...