Leonardo DiCaprio on his scooter

Who's that girl?!

Leonardo DiCaprio has been spotted necking a mysterious blonde.

The sexy actor, is rumoured to be secretly dating Lindsay Lohan, was just recently seen enjoying a passionate embrace with an exotic beauty in Cape Town, South Africa, where he is shooting his new film, 'The Blood Diamond'.

An eyewitness told UK's tabloid: "He picked up a woman called Tamara, who looks like his ex Gisele Bundchen, at Cafe Caprice. Then they went on to another club, Opium, and were kissing like mad.

Earlier this week, it was claimed DiCaprio and Lohan have been secretly dating for three months.

The 'Titanic' star and the 19-year-old actress, who is 12 years younger DiCaprio, are rumoured to have fallen in love since meeting over New Year.

"Leonardo is besotted with Lindsay. They are a perfect match," according to Mirror.