Melbourne, Jan 25 (Agencies): Australian actor Sam Worthington has reportedly split from with Natalie Marks ending three years of relationship

‘Avatar’ star and the fashion designer have not been seen together since last October when they were spotted watching a basketball match at New York's Madison Square Gardens.

"It has been on the cards a while, I believe," said the source close to the actor.

The couple met while Marks, 24, was working for his Australian-based management agency, Shanahans.

Worthington had once said that it was his girlfriend who kept his feet on the ground.

"She keeps me in line, she makes me do the washing,"  he had said. Worthington is currently preparing to film 'Wrath Of The Titans', the sequel to 'Clash Of The Titans'.