"I would get a whole box of sugar-crusted pastries delivered to my door," she says. "And I'd sit on my couch and eat the whole thing."
Misty Copeland's next leap: Giving us all better bodies →
Witherspoon co-founded a production company, Pacific Standard, which aims to make films featuring strong female lead roles - "not the wife or the girlfriend, but the lead," she said - as a way to fight the gender gap in Hollywood.
Caitlyn Jenner: Last 6 months have been 'eye-opening' →