The Oscar-winning actress and mother of one scooped the annual honour from People magazine – although seemed rather bashful when she found out!
Recalling the moment she learned of the title, she said: "No, really. I just said, 'That's ridiculous!' I've told no one."
Well, everyone will know now!
The 50-year-old told the magazine that real beauty is effortless, adding the most important thing for her day to day isn't appearance, it's her five-year-old son Louis.
"What is beautiful is the honour of being Louis' mother," she said.
Other stars featured in this year's Most Beautiful issue include Vanessa Hudgens, Ariana Grande and Meghan Trainor.
The winner of last year's People Magazine's Most Beautiful Woman In The World prize was 12 Years a Slave actress Lupita Nyong'o. Previous winners have included Beyonce, Julia Roberts, Jennifer Lopez, Jennifer Aniston and Catherine Zeta-Jones.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!