Jim Parsons and Mayim Bialik in a scene from Big Bang Theory. Image Credit: Warner Bros. Television

Former 'The Big Bang Theory' co-stars Jim Parsons and Mayim Bialik will reunite on screen as their iconic characters, Sheldon Cooper and Amy Farrah Fowler, for the finale of the prequel series 'Young Sheldon.'

This will be the first time the actors will be portraying these beloved characters since the tearful series finale of 'The Big Bang Theory' in 2019.

While details of their appearance are being kept under wraps, it's sure to be a nostalgic treat for viewers who have followed Sheldon's journey from childhood genius to Nobel Prize-winning physicist. Parsons, who is also an executive producer and narrator for 'Young Sheldon,' has been a constant presence throughout the series. Bialik has also lent her voice to two episodes.

In addition, a new spin-off series has been announced, focusing on the beloved characters Georgie Cooper and Mandy McAllister. Montana Jordan and Emily Osment will reprise their roles as the young couple navigating the complexities of adulthood, parenting, and marriage while living in Texas.