The former Friends star shone in a purple Galvin gown as she walked the red carpet with Justin in New York City on Tuesday night (9 February).
She kept her blonde hair tied back in a ponytail.
Justin co-wrote Zoolander 2, which has managed to pull in an impressive number of celebrity cameo appearances! We'll see Kim Kardashian, Justin Bieber, Miley Cyrus, Demi Lovato and Kanye West pop up!
In an interview with The Telegraph last week, Justin said during the making of the first movie, it was hard to get stars to appear because the fashion industry was seen as very serious. But that all changed for the sequel.
"They couldn't get them to agree to be in it at that point, because people thought they would just be made fun of, so they just had to turn up on red carpets and get people like Natalie Portman to say how much she liked Derek Zoolander," he said.
"[For the second movie] people were literally lining up to be involved. They'd say: 'Please can you just put me in the front row? I'll do anything.' And a handful of them were essential but then there were others who were fun but basically interchangeable."
Jennifer and Justin married in August 2015 after a three-year engagement.