The stars were out in force last night at the Marvel Avengers Assemble Worldwide Premiere in Hollywood.

Scarlett Johansson - who plays Black Widow in the superhero themed movie - looked stunning in a black, peplum-style Versace dress, while cast mates Chris Hemsworth and Robert Downey Junior rocked the red carpet in suave suits.

Scarlett Johansson at the Marvel Avengers Assemble Premiere in Hollywood

The hotly anticipated film brings together iconic superheros, including Ironman, The Incredible Hulk and Captain America as they battle to save the world from certain doom.

Sounds ace – not to mention that any film starring hotties Chris Hemsworth and Chris Evans is a must-see in our book!

Chris Evans at the Avengers Assemble Premiere in Hollywood

Phwoar.

Chris Hemsworth at the Avengers Assemble premiere in Hollywood

Double Phwoar.

Check out more pictures from the star-studded event and tell us what you think – who was best dressed?

Robert Downey Junior at the Hollywood Premiere of Marvel Avengers Assemble

Robert Downey Jr. - working some pretty awesome shades - with his wife, Susan.

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Colbie Smulders at the Avengers Assemble premiere in Hollywood

How smokin’ does Colbie Smulders look? The 30-year-old How I Met Your Mother actress smouldered in a sequinned black gown with plunging neckline.

Bella Thorne at the Marvel Avengers Assemble premiere in Hollywood

Bella Thorne's gorgeous red hair sets off this Midnight Blue gown perfectly. Glamourous much?

Kat Graham at the Marvel Avengers Assemble Premiere in Hollywood

Kat Graham looks futuristic in a fish-tail frock.

Phew, after ogling that gorgeous lot, we'll be avoiding all mirrors for a while!

Marvel Avengers Assemble: Take a peek behind the scenes with Robert Downey Jr.

New Marvel Avengers Assemble Trailer

Chris Hemsworth, Scarlett Johansson & Robert Downey Jr in new Avengers posters!