Going through something so difficult at the same time, we became very good friends. We became closer and closer,' she said.

'It was so unexpected. We both recognised that if we were going to take the relationship to the next step, we could no longer work together,' she added.

Swank reveals she is hoping to cement their relationship with a baby but for now is busy looking after his son Sam, from a previous relationship.

'Sam's a sweetheart. I most definitely want children. It's something I'd like to do someday. And when the timing is right I'll hopefully know it,' she said.