Despite the upheaval in her personal life, Holmes is appearing on Lifetime's fashion competition
Credit: Charles Guerin/ABACA

For Katie Holmes, the show must go on.

The actress, who on Friday filed for divorce from her husband of five years, Tom Cruise, kept her previously scheduled Monday appearance on the Lifetime reality fashion competition Project Runway: All Stars, PEOPLE has learned.

And according to judge Isaac Mizrahi, Holmes, who appeared as a guest judge, was a nice addition to the show. “She did great,” he told PEOPLE after the taping.

Added a source: “She was engaged, articulate and wonderful!” The show tapes at Parsons The New School of Design, whose fashion school is located in New York City.

Project Runaway: All Stars is a spin-off of the original Project Runway, which will begin airing its 10th season July 19.

The first-season finale of All Stars was held last March. The winner – as judged by Angela Lindvall, Georgina Chapman, Mizrahi and guest judges Tommy Hilfiger and Neiman Marcus fashion director Ken Downing – was Project Runway season 8 contestant Mondo Guerra.