The pair have teamed up for the drama Revolutionary Road, directed by Kate's husband, Oscar-winning American Beauty director Sam Mendes.
Together again: Leonardo DiCaprio and Kate Winslet in Revolutionary Road
Of the highly anticipated reunion, Winslet says: 'I hadn't realised how much my chemistry with him since Titanic would still stick.'
But the actress admits that while the chemistry came easily, the love scenes were rather awkward.
Spark: Kate says the pair still have their onscreen chemistry
She says: 'I just kept saying, "This is too ... weird."
'And Leo was like, "Oh, get over it." And I'm going, "Yeah, a little reminder: You're my best friend. He's my husband. This is a bit weird."'
The film details the disintegration of the couple's marriage as life fails to live up to the much-promised American Dream.
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