The 35-year-old actor and the 24-year-old Israeli supermodel rekindled their romance earlier this year, after splitting last June. Leonardo is said to be keen to prove he is now fully committed to their relationship, and so has asked his party-loving friend Lukas Haas to move out of his lavish Hollywood Hills home to make way for Bar.
Bar and Leonardo are thought to have ended their four-year romance last year because she was concerned about his constant partying. His decision to invite her to move in is said to be his way of showing her he is ready to settle down for good.
"Leo asked Bar to move in with him," an insider told the National Enquirer magazine. "She had virtually threatened to walk unless Leo gave up his bachelor ways, so Leo suggested they live together.
"Leo and his friends have a long history of carousing and partying. I think she basically told Leo he needed to grow up so he gave Lukas his marching orders."
The source also hinted Leonardo might propose to Bar in the near future.