It's hard to believe that The Big Bang Theory has been on the air for almost 11 years, and we have yet to meet Sheldon's older brother.
But here we are, and a popular actor has landed the coveted role of Georgie.
That actor is Jerry O'Connell, appear as the older, but less wise character on The Big Bang Season 11 Episode 24.
The news was confirmed Wednesday night at a joint panel for The Big Bang Theory and spinoff, Young Sheldon at Paleyfest.
That episode is poised to revolve around the wedding between Sheldon and Amy, so it makes sense to have the character appear.
O'Connell is a proven comedy actor and has had roles in the likes of Scream Queens, Carpoolers, and Ugly Betty.
Laurie Metcalf will also be reprising her role as Sheldon's mother, Mary on the milestone installment which is slated to air in May.
If you watch Young Sheldon online, you will already have met Georgie. He is played on the offshoot by Montana Jordan.
The spinoff debuted last September and has cemented itself as one of the highest-rated comedy series on TV.
Young Sheldon Season 1 is currently averaging 12.9 million viewers and a 2.3 rating among adults 18-49. It catapults double digits when seven days of DVR viewing is factored in.
It makes sense then that CBS has gifted the series with an early sophomore renewal for next season.
It's unclear when, exactly, The Big Bang Theory will come to an end, but there have been rumblings that Season 12 could mark the show's final season.
Okay, The Big Bang Theory Fanatics!
What are your thoughts on this casting scoop?
Are you in?
The Big Bang Theory airs Thursdays on CBS.
Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.