The "Anna Karenina" star wed Klaxons musician James Righton earlier this year and says she finds marriage liberating, reported Hello Magazine.
The 28-year-old also revealed that she finds her love life, whether a heartbreak or joy, as inspiration for her acting work.
"It depends, but you can get some great stuff out of break-ups and grief. Then you can get some great stuff out of the other side, too. I don't think one is better than the other. I don't think you can forget heartbreak or any of the negative stuff. When you have experienced it, you can always use it," she said.