Leonardo Dicaprio has split from his supermodel girlfriend.

The 'Revolutionary Road' star, who has been dating Bar Refaeli on and off since 2005, has reportedly decided he needs some space from the Israeli-born beauty.

It has been claimed the relationship fizzled out because 24-year-old Bar was keen to settle down and set up home with the actor, while Leonardo didn't feel he was ready to fully commit to her.

A source told People magazine: "They're taking time off for the time being, they've split. It could just end up as a break, but for now they're doing their own thing.

"She wanted to move faster than he did, she wanted to move in together, so he broke it off."

Reports the relationship was in trouble surfaced after Leonardo, 34, was seen flirting with several women while he partied in New York's Avenue club last month.

A source revealed: "He was standing at the bar in front of everyone talking to a girl the entire night - and it wasn't Bar. It was in no way behaviour for a guy who has a serious girlfriend."

Bar also hinted the romance was on the rocks when she appeared at Hollywood Life's 11th Annual Young Hollywood Awards alone last Sunday (07.06.09).

When asked for advice on making relationships work, Bar replied: "Oh, I am not going to get into that."

Leonardo and Bar briefly split late last year, before rekindling their romance in December.

Earlier this year, it was claimed Bar's father Rafael Refaeli had forbidden the Sports Illustrated model from marrying outside her Jewish faith and Leonardo would have to convert if they wed.