Megan Fox has admitted her best onscreen kiss was with Shia LaBeouf.

The 'Teenage Mutant Ninja Turtles' star - who has locked lips with the likes of Adam Scott and Amanda Seyfried in the past - enjoyed her smooch with the 28-year-old actor whilst filming 'The Transformers' in 2009.

When asked by E! News who her favourite onscreen kiss was with, she replied without any hesitation: ''Shia LaBeouf.''

Megan, 28, also recently admitted she's not worried about her former co-star after he was arrested in New York in June for allegedly yelling offensive language and slapping people's bottoms midway through a Broadway performance of 'Cabaret' at Studio 54.

She told the New York Post newspaper: ''I'm not worried about Shia. I love my Shia. He's perfectly fine. I haven't talked to him in a couple of years, but I don't worry about him. He's a brilliant kid, talented and funny... There's no reason to worry.''

Shia - who was charged with harassment, disorderly conduct and criminal trespassing after the incident - is currently receiving treatment for alcohol addiction.

His representative said at the time: ''Shia LaBeouf has not checked into a rehabilitation facility but he is voluntarily receiving treatment for alcohol addiction. He understands that these recent actions are a symptom of a larger health problem and he has taken the first of many necessary steps towards recovery.''

Meanwhile, Megan is happily married to Brian Austin Green and has two children, Noah, 22 months, and Bodhi, five months, with him.