Mar 11, 2009, 10:00 GMT
Gemma Arterton got "carried away" and stuck her tongue in co-star Jake Gyllenhaal's mouth while shooting their new movie.
The British actress admits she broke a strict rule while filming love scenes for their upcoming film 'Prince of Persia: The Sands of Time'.
She explained: "There's an unspoken no-tongues rule on set. But I got so carried away, it kind of slipped out."
Despite shocking Jake - who is dating actress Reese Witherspoon - Gemma insists that her co-star should be thankful.
She added: "Everyone said I was lucky to be kissing him, but he's the lucky one!"
This is not the first time Gemma has made an embarrassing blunder while filming a love scene.
The 23-year-old star previously confessed to being a "giggling mess" when she filmed an intimate encounter with Daniel Craig for recent James Bond movie 'Quantum of Solace'.
She said: "Kissing Daniel was great - I can't pretend it wasn't. It was my first day on set and I'd only met him once before - and then suddenly we were expected to kiss.
"He was very cool and I was a giggling mess. I mumbled something like, 'I just kissed you!' and he just coolly said, 'Yes, you did. And now we have to do it again.' Fortunately, he's an incredible kisser."
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