‘Georgie & Mandy’s First Marriage’ stars Emily Osment and Montana Jordan take ET’s Deidre Behar behind the scenes of the show’s opening credits tango dance number. The pair also opens up about bringing their ‘Young Sheldon’ characters back to the screen with the spinoff series. Plus, Montana gives an update on fatherhood after welcoming his daughter, Emma Rae, in May. ‘Georgie & Mandy’s First Marriage’ premieres Oct. 17 on CBS.