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.

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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".

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Sexy Sirens: The duo play sisters in the film the Other Boleyn Girl

She told W magazine: "The only thing that's a little bit annoying is that I feel that I come off kind of boring sometimes."

Scarlett jumped to her defense, proving the two have forged a strong bond over the year.

Scarlett replied: " I don't think you're boring."

Judging by Natalie's display, it looks as if fans won't think so either.

The Other Boyleyn Girl sees the girls playing sisters Mary and Anne Boyleyn in the film adaptation of Philippa Gregory best-selling novel about their relationship with King Henry VIII.

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Close: Portman and Johansson have developed a strong friendship over the last year

Sultry pose: The Hollywood stars pose for the cover of this month's W magazine