The eight-episode series sees Reinhart and Raiff as the eponymous siblings who grapple with their changing lives as their dad (Mark Ruffalo) gets ready to welcome a new baby with his girlfriend (Betty ...

Cooper Raiff and Lili Reinhart play codependent siblings grappling with all the scary changes of adulthood in Hal & Harper. PEOPLE can exclusively premiere the trailer for the series, which premiered ...