Jennifer Lopez has dropped out as a judge on an upcoming episode of Heidi Klum's hit U.S. TV show Project Runway - after injuring her foot.

Klum announced Lopez has dropped out of the line-up of the series' finale on Friday, when Lopez's appearance was scheduled to be recorded.

Judge Nina Garcia hinted at the actress' participation earlier this week, although producers failed to confirm the star's stint on the show.

Fashion guru Tim Gunn, who mentors the contestants, will fill in for Lopez.