The 35-year-old British actress is mother to two-year old son Solo and is currently expecting her second child with her mathematical researcher boyfriend Robie Uniacke. Here are six more facts to know about Pike:
1. She's musical.
Pike is the only child of Julian, a professional opera singer and Caroline, a concert violinist. She plays the piano and cello.
2. She's an Oxford university graduate.
After attending boarding school in Bristol, Pike graduated from Oxford's Wadham College with a degree in English Literature.
3. She's a pro at boxing.
Seventh months after she was cast as Amy Dunne in Gone Girl, Pike started boxing lessons with the no. 5 welterweight female boxer in the world, Holly Lawson. Why? "In the past, during action scenes, I used to worry that I ran like a girl," she explained to W magazine during one of her training sessions.
4. She beat two Oscar-winning actresses to the Gone Girl role.
Natalie Portman and Charlize Theron were both said to be interested in playing Dunne - but David Fincher, the film's director, had other ideas. "I liked that people didn't immediately know who Rosamund was," he said in an interview with W.
5. She loves cake.
She once baked "an exceptionally light, scrumptious rhubarb and orange confection" for an interview with the Guardian's Lynn Barber, during which she explained how much she likes eating. "I love food - I'm a foodie," she told Barber, before revealing she never weighs herself.
6. She's friends with Tom Cruise
Pike starred alongside Cruise in the blockbuster Jack Reacher and got so chummy with "Tommy" and his then wife Katie Holmes, she invited the couple round for dinner. "They came with no entourage and we had this messy family supper," the told the Telegraph. "Afterwards they both helped with the washing-up. It couldn't have been more normal."