If Mr. Lundy looks familiar, you might be a Seinfeld fan. Actor Jason Alexander — who's famous for playing George Costanza on the beloved sitcom Seinfeld — plays the enthusiastic drama teacher. Fun fact: Jason Alexander's George Costanza was very much based on Seinfeld co-creator Larry David.

Jason is also known for his roles in films like 1990's iconic rom-com Pretty Woman and 2001's fantasy rom-com Shallow Hal.

Jason Alexander as Mr. Lundy is set to return in Young Sheldon Season 5, Episode 12, titled "A Pink Cadillac and a Glorious Tribal Dance." Based on the episode's promo, it looks like Mr. Lundy is now a part of a makeup pyramid scheme — we mean MLM. And he doesn't work for just any MLM; Mr. Lundy works for the infamous Mary Kay, which began back in 1963.

"Mr. Lundy is selling makeup! I think I'd be good at it," Mary Cooper (Zoe Perry) exclaims in the promo.

He's a thespian, he's a teacher, he's a coach, and now he's an entrepreneur? Interesting, interesting.

New episodes of Young Sheldon air Thursdays at 8 p.m. EST on CBS.