NBC updated its Friday night lineup in the fall 2025 TV schedule with Stumble, a new cheerleading mockumentary led by Jenn Lyon as determined cheer coach Courteney and Taran Killam as her football coach husband Boon. The misfit troop of athletes under Courteney's guidance is becoming less dysfunctional with each episode, but rival cheer coach Tammy could cause some problems. The one and only Kristin Chenoweth is on board to steal scenes as Tammy Istiny, and the showrunners shared with CinemaBlend that she was the only candidate for the role.
After the first few episodes of Season 1 (available streaming now with a Peacock subscription), Tammy has become a scene-stealer who claims to be Courteney's friend after their coaching stint together at Sammy Davis Sr. Junior College, but she's also the coach of Courteney's team's main competition. Practically exuding pep as Tammy, I find it hard to imagine anybody else in the role.
