Anne Hathaway is always on our Best Dressed lists and last night at the One Day premiere, sponsored by Olay, she didn't disappoint.

Looking chic and glamorous in a black and gold Alexander McQueen dress, long shiny brunette locks and perfectly defined eyes, she shared this wise beauty tip on how to look gorgeous: "Eat, sleep and make out with a really cute boy in Paris!" Ahhh...Anne, we love you.

Try on Anne Hathaway's hairstyles in the Makeover Studio!

One Day is a love story (total tear jerker) about Emma (Hathaway) and Dex (Jim Sturgess) that plays out over the span of 20 years, from their early twenties to their mid-forties.

"I didn't mind aging as much as I thought I would," says Hathaway. "As my character got older, they gave me a few wrinkles and used makeup to age me, but it wasn't that bad. Aging is a part of life and it's not just about beauty. It's about knowing more about yourself and that shows in how you look."

Her delish co-star agreed. "It was very cool to play so many different ages in one film and go through that transformation. They changed my hair a lot to show Dex aging--I got pretty gray," says Sturgess. (Even at his grayest, he was still pretty cute.)

Director Lone Sherfig had the wisest thing to say about how to age gracefully: "I think it all depends on how happy you are. If you like who you become, then it shows in a positive way. And that's beautiful."

Try on Anne Hathaway's hairstyles in the Makeover Studio!