Sophie Turner and Jessica Chastain promote Dark Phoenix in London

Sophie Turner and Jessica Chastain could barely control their giggles as they attended a photocall for their film X-Men: Dark Phoenix.

The actresses looked as if they were having a blast at the event in London.

Turner, who plays Jean Grey in the Marvel film, looked stylish in jeans and a white crop top with mirrored sections around the bottom and at the neck.

Black and silver shoes completed her fashion-forward look.

Chastain, who plays an alien shapeshifter in the movie, was elegant in a black dress with a deep plunge.

The actresses were joined on the red carpet by co-stars Michael Fassbender and James McAvoy, who play Erik Lehnsherr/Magneto and Charles Xavier/Professor X.

X-Men: Dark Phoenix is released in UK cinemas in June.