Kate Winslet has reportedly turned to her ‘Titanic’ and ‘Revolutionary Road’ co-star Leonardo DiCaprio for support, following the breakdown of her marriage to director Sam Mendes.

Kate Winslet is being supported through her marriage break-up by Leonardo DiCaprio.

The actress turned to her co-star when problems started to surface in her relationship with director Sam Mendes as the trio worked together on 2008 movie ‘Revolutionary Road’ and she is said to be relying on his support to get through this difficult time.

A source revealed that Leonardo and Kate have been like brother and sister since they starred in ‘Titanic’ together.

While Kate - who is currently holidaying in Mexico with her two children, six-year-old son Joe and Mia, her nine-year-old daughter from her marriage to Jim Threapleton - has a close friendship with Leonardo. Sam’s bond with actress Rebecca Hall, 27, was reportedly the cause of many of their rows.

The director first met Rebecca in 2006 on the set of movie ‘Starter For 10’ - who he acted as executive producer on - and worked on two theatre productions, ‘A Winter’s Tale’ and ‘The Cherry Orchard’, in New York and London as part of his Bridge Project theatre company last summer.

It has also been claimed the end of their six-year marriage came about after a row over conflicting work schedules, with 44-year-old Sam lined up to direct the new James Bond film in London and Kate, 34, planning to star in a US TV comedy show.

Kate and Sam - who married in May 2003 - announced their split on Monday, but friends claim they have been living apart for several months.