The 43-year-old actor attended the launch of ex-wife Jennifer Meyer's jewelry boutique in Los Angeles, California, on Wednesday. The pair, who announced their separation in 2016 after nine years of marriage, looked cozy as ever at the star-studded fête.
Maguire kept it casual for the occasion, opting for a gray T-shirt and dark pants. Meanwhile Meyer, 41, was dressed to the nines in a strapless, black mini-dress, dangling earrings and sparkling necklaces and bracelets.
The Great Gatsby star wasn't the only celebrity to turn up for Meyer's big night! Reese Witherspoon, Kris Jenner, James Corden, Demi Moore, Sara Gilbert, Rachel Zoe, Rachel Bilson, and Erin and Sara Foster were also in attendance.
Though Meyer's relationship with Maguire may be over, couples were out in full force at the event. Leslie Mann and Judd Apatow, as well as Katherine McPhee and David Foster made a date night of the party.
Maguire and Meyer announced their separation in Oct. 2016, before finalizing their divorce a year later. Back in 2016, a source told ET that the former couple -- who share two children, Ruby, 11, and Otis, 9 -- saw their marriage fall apart "over the course of time."
The source called the separation "amicable," noting that, as showcased Wednesday night, they are "very supportive of each other."