Project Runway season 21

The twenty-first season of the American reality competition series Project Runway premiered on July 31 and concluded on September 25, 2025. It marked the first season to air through cable network Freeform, departing from its previous run on Bravo since its 2004 debut. The season featured twelve contestants competing in garment design challenges, with participants eliminated throughout the competition based on judges' critiques until a winner was determined.

After initially departing in season sixteen (2017), German model Heidi Klum reprised her role as head judge alongside Colombian fashion journalist Nina García returning, with stylist Law Roach joining the judging panel for the first time. Fashion designer Christian Siriano also came back as a mentor for the designer contestants. Michael Kors returned as a guest judge for the season finale. Former contestants Jesus Estrada (of season seven) and Caycee Black (of season nineteen) returned to compete again.

Veejay Floresca became the first transgender woman to be announced as the winner of the season. She received a cash prize of $200,000, a six-month representation from Agentry PR, a mentorship with the Council of Fashion Designers of America (CFDA), alongside a magazine spread in the American edition of Elle. Jesus Estrada and Ethan Mundt ultimately finished as runners-up. After concluding its season finale, the series was later renewed for a twenty-second season by Disney Television Group.