The 'Anna Karenina' actress, who is engaged to Klaxons musician James Righton, admits regular questions about pregnancy have made her worry about her figure.
"People keep trying to make me pregnant! I'm not ready for it. Yes I'd love to at some point but not this quick, stop trying to make me pregnant," femalefirst.co.uk quoted Knightley as saying.
"I have been asked whether I am pregnant yet about four or five times. And I started thinking, 'Do I look like I'm pregnant ... I'm a very thin girl, I am sure I don't look pregnant!' It's the ring on my finger," she added.