Oscar-winning actress Kate Winslet is getting a much needed shoulder to lean on from old pal Leonardo DiCaprio as she preps for a divorce battle with American Beauty director Sam Mendes.

The couple, who have been married since 2003 and have a six-year-old son, Joe, insist the breakup is “amicable.”

They shot to fame playing lovers in the movie Titanic and were reunited on screen two years ago in Revolutionary Road – directed by Mendes. Now twice-married Winslet’s friendship with DiCaprio, 35, has been rekindled as her six-year marriage crumbles.

A source revealed to Britain’s The Sun: “Leo and Kate have been like brother and sister since they starred in Titanic together. Kate has always really adored Leo and feels like she can tell him anything….He’s been a rock for her.”