‘Georgie & Mandy’s First Marriage’ stars Montana Jordan and Emily Osment take ET’s Deidre Behar behind the scenes of the ‘Young Sheldon’ spinoff. Montana shares an update on fatherhood and jokes that Iain Armitage is ‘on payroll’ to babysit his daughter, Emma Rae. ‘Georgie & Mandy’s First Marriage’ premieres today on CBS.