The Mission: Impossible - Ghost Protocol actress welcomed son Julian Fuego with partner Robin Thicke in April 2010.
Patton recalled the struggle of shedding pounds in order to get in shape for the action role in an interview with People.
"It was really... most grueling and one of the hardest things I've done. I worked out for two and half hours, six days a week for a couple of months. It was so hard!" she said.
"I would never cry in front of the boys, but inside I was hurting and a little depressed. You have to get past that moment of self-doubt. After a month, the wall came down and the training felt doable. It still wasn't easy, but doable and that felt really empowering."
Patton went on to say that being a parent changed her world view, adding: "Becoming a mother is the best thing that's happened to me. [Julian]'s at the age where he's talking. He's not doing soliloquies, but he's saying 'Mama', 'Dada', 'car' and 'dog'. His vocabulary is growing every day. He makes me so happy."
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