Revord revealed Missy's ending on Young Sheldon bummed her out, but there's a chance things might get better for her on Georgie & Mandy's First Marriage. Holland spoke to TV Insider about the character's return and how she'll be different in the new series:

As fans of Young Sheldon will recall, Cooper family patriarch George Sr. ( Lance Barber) died in the final episodes of the series, forcing the family to cope with his loss, but viewers haven’t seen that full journey, which will be explored in Georgie’s relationship with his sister Missy ( Raegan Revord ).

Georgie & Mandy's First Marriage reintroduces viewers to characters from Young Sheldon while bringing in some new faces as well. The Big Bang Theory, which aired from 2007 to 2019, starred Jim Parsons (Sheldon Cooper),

Thanksgiving is a time for the whole family to gather, no matter where you live. And that makes for the perfect opportunity for a reunion and to do so on television shows as well. Especially in the case of Georgie and Mandy's First Marriage being a spin-off of Young Sheldon on CBS.

A brand new behind-the-scenes video confirms the return of four Young Sheldon actors for Georgie & Mandy's First Marriage's Thanksgiving episode.