Leonardo DiCaprio on Saturday celebrated his 38th birthday with star-studded party in New York, but he stayed close to rumoured girlfriend Margot Robbie. Has the Hollywoood A-lister fallen for a 22-year-old Australian actress?

DiCaprio is still fresh out of a failed romantic relationship with supermodel Erin Heatherton.

Beyoncé, Jay-Z, Robert De Niro and Cameron Diaz were among the attendees at DiCaprio's birthday party, which lasted up to 6:30am, according to Daily Mail.

Robbie starred in the long-running soap opera in Australian TV, "Neighbours." She later starred in the now defunct series "Pan Am." The Daily Mail emphasized DiCaprio made sure that nobody fails to notice the young actress in the party.

In its report, Page Six described Robbie as "the Australian beauty who we recently revealed he has been spending more time with." It further revealed the rumoured couple were recently spotted at a Las Vegas party.

Soon in cinemas: Leonardo DiCaprio and Margot Robbie in "Wolf of Wall Street"

DiCaprio and Robbie are working together in "Wolf of Wall Street," a film by Martin Scorsese, who was also present at the party.

Robbie does not seem to be active on Twitter, but what she has posted, she seems to be a positively cheerful young girl who loves her friends and family. And she loves costume parties. (See this whosay photo.)

The award-winning actor apparently raised some money for the Red Cross through his birthday party. The event reportedly raised $500,000 out of fees for every bottle of booze sold to be donated for charity.

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