Brad Pitt, Leonardo DiCaprio & Margot Robbie Are Ridiculously Cute Together in Cannes

Brad Pitt, Leonardo DiCaprio and Margot Robbie may be the hottest trio in Hollywood, and when they come together on the red carpet it's almost too much to handle.

The "Once Upon a Time in Hollywood" stars, who are gracing the big screen together in the upcoming Quentin Tarantino flick, joined forces for the screening of the movie on Tuesday at the Cannes Film Festival.

Stars like Chloë Sevigny, Adrien Brody and Michelle Rodriguez were there too, but we can't get past the three stars of the film ... because they're really, really ridiculously good looking.

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Pitt, DiCaprio and Robbie posed together on the carpet with Tarantino before heading into the show.

Wearing sequined pants and a blush doll dress, Robbie channeled her inner Sharon Tate straight out of the Golden Age.

Pitt and DiCaprio have an 11-year gap between them, but you wouldn't know by seeing them in their matching tuxes and bow ties. FYI -- this is the first time the two leading men have ever joined forces in a feature film.

The Cannes screening is perfect timing, considering the official trailer that just dropped today.

"Once Upon a Time in Hollywood," which also stars Al Pacino, Kurt Russell, Dakota Fanning and the late Luke Perry, hits theaters July 26.

!youtube-embed(https://www.youtube.com/watch?v=ELeMaP8EPAA)