Klum Steps Back In as Guest Judge for AGT Quarterfinals While Cowell Recovers

Heidi Klum will temporarily rejoin the judging panel of NBC's America's Got Talent during the Season 21 quarterfinals, filling in for Simon Cowell, who is recovering from back surgery. The announcement was made during Wednesday's episode, with Klum set to appear on a special three-hour broadcast next week. Klum previously served as an AGT judge from 2013 to 2018 and again from 2020 to 2024 before leaving to host Project Runway.
Klum’s return marks a temporary reunion with the panel she left in 2024 to host Project Runway’s revival. Her prior AGT tenure spanned two stints, totaling nearly a decade, making her a familiar face for longtime viewers. The fill-in role follows Kenan Thompson’s recent guest judging appearance, as the show rotates substitutes while Cowell recuperates. Next week’s three-hour quarterfinal broadcast will feature Klum alongside regular judges Sofia Vergara, Howie Mandel, and Terry Crews.
The announcement came during Wednesday’s episode, with producers framing Klum’s cameo as a seamless stopgap. Her history with the series includes memorable moments with golden buzzers and contestant critiques, though her current commitment to Project Runway likely limits this to a single appearance. NBC has not indicated whether additional guest judges will join later rounds.
This casting swap could reassure loyal AGT viewers seeking continuity during Cowell’s absence, as Klum’s established rapport with the format may soften any disruption. It may also boost cross-promotion for her Project Runway return, drawing reality-TV fans between the two franchises. However, the impact is largely contained to entertainment audiences, with no broader societal effect beyond reinforcing the industry’s reliance on familiar personalities to maintain ratings stability.