British actress Helena Bonham-CARTER insists she would have "divorced" boyfriend Tim Burton if he hadn't cast her in his latest movie. The star battled against 40 other actresses to land a part in the Burton-directed film Sweeney Todd, but admits merging her work and personal life has taken its toll. She says, "I auditioned for my role - although I'd have divorced Tim if I hadn't got it. In fact, we're not even married, but I'd have still divorced him. "We had no talk of it at home, because until he'd seen every other actress, Tim wouldn't say anything. And then when I knew I had the part, I thought, 'Oh my God we've got to work together', which is also stressful. "It's complicated leaving your personal life at home when you've got to work."