Miller, 33, who has three-year-old daughter Marlowe with Tom Sturridge, even thought about doing a midwife course, reported Hello! magazine.
"I always knew I could not have been working in an office. Routine has always made me very uncomfortable but designing or working in a kitchen - why not? I also thought about doing a midwife course after having a baby. I love music, but I do love my profession," Miller said.
The actress whose next , "Burnt" is all set for release, found it really hard to work on the film as she had to balance between her job and baby.