The Other Boleyn Girl may have been panned by critics, but it seems co-stars Natalie Portman and Scarlett Johansson have discovered other ways of pulling in audiences.

The stunning duo, attending the Berlin premiere of the film, shared more than just a giggle - as they took a moment to exchange a steamy kiss - while posing for pictures on the red carpet.

Scarlett Johansson (left) and Natalie Portman lock lips during the Berlinale Film Festival on Friday

The Hollywood sirens have obviously cultivated a close friendship since playing sisters on screen and were not afraid to show it as Natalie, 26, leaned in to lock lips with the blonde bombshell.

Scarlett, 23, looked more than happy to be the object of Natalie's affections, showing off her cleavage in a 50's inspired fuscia-coloured dress, while the brunette opted for an equally sexy black lace number.

Perhaps Natalie's bold move came as an attempt to change the public's perception after recently proclaiming herself as "boring".