(Cover) - EN Showbiz - Leonardo DiCaprio and Bar Refaeli are reportedly going through a difficult patch.

The American actor and Israeli model began dating in 2005 but parted ways four years later. They reignited their romance last year and there have even been rumours they are planning to move in together.

However, its been claimed the couple are experiencing problems again, and are desperately trying to settle their differences.

Sources say Leo and Bar have been going through a difficult patch, but they are trying to work it out, reports New York Post.

Speculation surfaced again on Monday, when Leonardo and Bar decided to party in separate locations after the prestigious Metropolitan Museum of Art's Costume Institute Gala in New York. Bar attended the event and subsequent after-party, wearing a stunning black minidress by Rag + Bone which was corseted.

Although she was spotted laughing and joking at the evening bash held at hip nightspot The Crown, Leonardo was nowhere in sight. Instead he choose to party at the exclusive Top of the Standard with his male pals, and looked casual in jeans and a baseball cap. Naomi Watts and Carmelo Anthony were also there.

Bars representative couldnt be reached, while Leonardos chose not to comment. (C) Cover Media