Anne Hathaway in Bathing Suit Top Says "Happy New Year" Celebwell

Anne Hathaway is celebrating the new year in her swimsuit top! The Academy Award winning actress sparkles in one of her latest social media posts, showing off her washboard abs in a sequined bathing suit. "Happy New Year," she captioned the Instagram snap. How does the 40-year-old maintain her fit physique? Read on to

Anne Hathaway is celebrating the new year – in her swimsuit top! The Academy Award winning actress sparkles in one of her latest social media posts, showing off her washboard abs in a sequined bathing suit. "Happy New Year," she captioned the Instagram snap. How does the 40-year-old maintain her fit physique? Read on to see 5 of Anne Hathaway's top tips for staying in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Anne, a former vegan, maintains that her approach to diet changed when she started shooting Interstellar and was forced to wear a 40-pound spacesuit. "I just didn't feel good or healthy," she confessed to Harper's Bazaar, adding that she felt "not strong." After eating a fresh piece of fish while in Iceland—"from a stream I could see from where I was sitting," she "just felt better" and incorporated animal products back in her diet. "With eating, my number-one thing is trying to buy food that doesn't come in packaging," she told Shape about her diet. "Beyond that, I try not to eat red meat, and I try not to eat pork."

Anne is one of the many stars who avoids the bottle. "'My issue is I just love it. So. Much. But the way I do it makes me unavailable for my son. My last hangover lasted for five days. I'd earned it: it was a day drinking session with friends that went into an evening birthday party with one of my drinking buddies. I will never be that person who can nurse a glass of wine throughout an entire evening," she told Tatler.  

Anne famously shed a ton of weight to play Fantine in Les Miserables, losing 25 pounds fast. She later told PeopleTV's The Jess Cagle Interview that the weight loss put her in such a bad place couldn't enjoy the trophy. "I was just not in a grounded place in my life," she said. "I never wanted to go on and on about it, but that weight loss was not a long-term good thing for my health, and it took a really long time to come back from it. In order to do the transformation to play Fantine, I'd lost a lot of weight in about two weeks. I lost an unhealthy amount of weight in a short amount of time, and I was still really sick because of it."

"I'm not a natural wellness warrior," Anne confessed to Shape. "I have friends who go to longevity conventions. They take crystal baths. For me, I try to make it to yoga three or four times a week. It's a different story when I'm working on a film, though. I work out with a trainer, and I do a lot of strength training and HIIT when I need to do that."

Anne's "low-key" approach to wellness is all about moderation. "The balancing [of my approach to keeping in shape] is important to me. My go-to for a lot of my life was to feel bad about myself, and I just don't want to do that anymore," she told Shape. 

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