Robert Pattinson and Kristen Stewart try to keep their relationship away from the spotlight - but a new video has caught them in a rather pubic moment of passion.

The couple are chatting and joking around at an after party in Cannes before Rob, 26, leans in for a snog with his girl.

The steamy pair can't keep their hands off each other and the clip ends with 22-year-old Kristen's arm around the back of Rob's neck.

The pair, who met when playing the roles of Bella Swan and Edward Cullen in the Twilight films, are very cagey about their romance and rarely talk about each other.

Though R-Pattz has admitted he enjoys playing Kristen's on-screen love interest.

'When we start the kissing scenes I forget we're surrounded by a load of people,' Rob told Now.

'I
actually end up getting really carried away.

'It's only when the kiss is
finished that my mind registers there's actually a set full of people
around, and I just walk away a bit embarrassed.'

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Esme Riley