Jennifer Lopez will reportedly be taking a timeout from running to help judge Bravo's Project Runway runway.

The 39-year-old actress/singer, currently in the final stages of training for a triathlon, will serve the guest judge for the show's fifth-season finale, which will tape at New York Fashion Week's spring fashion exhibition this Friday, Us Weekly reported Monday.

While Runway judge Nina Garcia was unable to confirm Lopez's participation to Us, she promised that the finale was "going to be unbelievable."

"The guest star is one of the most iconic women around," she told Us. "It's going to take the cake."

Each Runway season has featured a different celebrity serving as a guest judge for the show's New York Fashion Week runway show finales.

Parker Posey served as a guest judge during the initial Project Runway edition won by first-season champion Jay McCarroll, former Will and Grace star Debra Messing served as a member of judging panel that crowned Chloe Dao the show's second-season champion, New York Fashion Week founder Fern Mallis aided in the selection of third-season winner Jeffrey Sebelia, and most recently Victoria Beckham helped select Christian Siriano as the fourth-season winner.

Project Runway's fifth-season finale is currently scheduled to air on Wednesday, October 15 at 9PM ET/PT.