Actress says she completely trusts her co-star
‘When we filmed difficult scenes we developed a secret language of our own,’ she says.
‘With our history, we could do anything without feeling stupid.
‘I would even let Leo physically harm me if it meant making a scene better, and I know he feels the same.’
Kate, 33, has 8-year-old daughter Mia from her first marriage to Jim Threapleton and 5-year-old son Joe with Sam.