New casting information has been revealed for the Young Sheldon spinoff Georgie & Mandy's First Marriage. According to TVLine, Dougie Baldwin has been cast as a series regular, taking over the role of Connor, Emily Osment's brother. Jessie Prez has also joined the cast in a regular role as Ruben. Returning for the series will be some familiar faces, including Rachel Bay Jones and Will Sasso as the parents of Mandy and Connor, and Emily Osment and Montana Jordan reprising their roles. The show will premiere on Thursday, Oct. 17 on CBS. Source: TVLine