United Kingdom, Feb. 1 -- Rose Byrne has felt "grief" over becoming a mother.

The 46-year-old actress has sons Rocco, 10, and Rafael, eight, with partner Bobby Cannavale but admitted that she has felt like she lost a part of herself to motherhood.

She told The Times: "Having a baby is like going to the moon, and nobody ever tells you that. You don't want to feel like you don't love your child, but there is a grief around becoming a mother, because you lose part of yourself that you will never, ever, ever, ever, ever get back. It's OK to grieve that - in fact, we should. Because it's a before and an after."

Rose's comments came as she was discussing her latest film If I Had Legs I'd Kick You, the psychological comedy-drama, which tells ...