“The Big Bang Theory” was one of the biggest sitcoms of the 2000s, and its cast became huge stars as a result of it, while also taking home big checks for their performances.

Although Kaley Cuoco recently starred in Max’s “The Flight Attendant,” and voiced the lead character in the “Harley Quinn” animated series, she’s still best known for her role as Penny in the CBS series.

But there’s one person who was surprisingly clueless about Cuoco’s most famous role: her boyfriend, Tom Pelphrey.

The pair have been dating since early 2022, and recently had a daughter together, Matilda.

Pelphrey confessed to not knowing about Cuoco’s iconic role in an interview with W Magazine, explaining that he only found out about it when the couple visited his family, and they referred to her as Penny.