Elizabeth Debicki and Michelle Monaghan

GOING FOR GOLD: Ahead of the Bottega Veneta show, Elizabeth Debicki enthused about a different kind of outfit from what was expected on the runway: “an extraordinary, entirely gold” suit she wore on the set of “God Particle,” a science-fiction movie directed by Julius Onah. “It was a piece of art,” said the actress, who admitted she enjoyed playing the villain in the film, due out this year. Debicki was planning some quick shopping in Milan, as she was set to return home to Australia after her one-day stay in the city. The plot of Michelle Monaghan’s latest film is much more sobering, since “Patriots Day,” opposite Mark Wahlberg, is based on the 2013 Boston Marathon bombing.