Katy Perry, Jennifer Lopez, Alex Rodriguez and Jared Leto are also among the star-studded names for the annual event.
The 'Us' actress says the actor is a close friend and keeps him on speed dial.
See what the stars were up to this week.
While many male celebs donned simple tuxedos, there were a few who went the extra mile to live up to the event's Catholic-centered fashion theme.
ET sat down with Leto to chat about his fashion, musical inspiration and new album, 'America.'
ET caught up with the Thirty Seconds to Mars front man to talk about his new album, 'America,' and his cross-country tour, 'Monolith.'
Harry Styles, Lorde, Jared Leto and more stars helped pay tribute to the band on Friday night.
Hollywood's A-listers turn heads at the seventh annual event on Saturday night.
The 45-year-old actor says he hopes 'we all get a little closer' following the 'heartbreaking and senseless' attack.
The 'Blade Runner 2049' star will portray the legendary publisher in a film about his life.
Here's the biggest flicks heading to the big screen in 2017!
The 45-year-old actor is letting it all hang out.
Leto is once again taking method acting to new heights for his role in the upcoming sci-fi epic.
The 45-year-old musician remembered his friends who died earlier this summer.
