Kelly Brook kisses her female friends after a few too many drinks.

Kelly Brook

Kelly Brook

The 35-year-old beauty, who stars in new US sitcom 'One Big Happy', locks lips with co-star Elisha Cuthbert in an upcoming episode and Kelly admits it's not the first time she's locked lips with another woman.

According to The Sun newspaper, she said: "I'm usually three vodkas away from kissing a woman every weekend."

Kelly's confession comes shortly after she revealed she's been forbidden from dating her 'One Big Happy' co-star Nick Zano.

The actress - who's been involved in a high-profile spat with her ex-boyfriend David McIntosh - has been told by show bosses she cannot date her hunky American co-star because it could make things awkward on set.

She said: "I can't date him. We've been told we're not allowed to because, well ... we're just not allowed. It would just be awkward for everyone, we'd have a spat."

However, Kelly said the ban has helped make their on-screen kissing scenes look even more realistic.

She explained: "We keep it all on screen. So when we're kissing, we really go for it because there's a lot of pent-up sexual tension.

"But they'll tell us, 'This is network television, don't do this'."