Joan Collins in Bathing Suit is "Feeling Good" at Age 89

Joan Collins is 89 and still rocking a swimsuit like a pro! The legendary actress and writer shows off her ageless figure in a swimsuit via her latest social media post. “When it’s #100degrees in the #shade I am #grateful to have a #pool 🙏 #southoffrance #sainttropez #summer #sun #ahubby #funinthesun #feelinggood,” she captioned the stunning Instagram snap. What are her secrets to looking forever young? Read on to see 5 ways Joan Collins stays 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!

1. She Has a Moderate Approach to Diet

Collins once told W magazine that to stay healthy you should eat lots of fruits and vegetables and sardines, but also cookies when you feel like it. She also owes her longevity to being “extremely sensible and very disciplined,” she told UK’s OK! Magazine. “I don’t stuff myself with food. I only eat half of what’s on my plate and I won’t deprive myself. I’ll drink wine, have dessert, eat toast, and have coffee with sugar,” she said.

2. She Exercises, But Lightly

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Joan also revealed to W that she works out a few times a week, but steers clear of “no-pain, no-gain, Jane Fonda–type exercises. “I think that’s stupid to do after the age of 40,” she said, adding that “having a husband who’s 30 years younger is very helpful.”

3. She Doesn’t Diet…Anymore

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Joan admits that during her younger years she regularly dieted and took speed to stay thin. “She said: “The added incentive about not acting nowadays is not having to diet any more. Your hips always had to look slimmer, your face thinner. As an actress you are always on a diet when working,” she told The Daily Mail. “I was told to take speed to help get the weight off. At times I was told I wouldn’t even get work because I was too fat. As soon as they saw me in the flesh they insisted I go on a diet and exercise every day.” What was her slim-down fast diet? “It was tomatoes and cottage cheese, lettuce and cottage cheese and cottage cheese and cottage cheese.”

4. She Swims

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Collins also attributes her figure to swimming regularly and working out with her trainer. She also loves to dance. Her favorite song? Pharrell Williams’ Happy, she told The Gloss.

5. She Takes Supplements, Gets Enough Sleep, and Hydrates

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In 2015, at the launch of her fragrance, “I Am Woman,” Collins revealed to the Daily Mail that she also consumed lots of healthy fats (avocados) and takes vitamin C, E, and omega oil supplements. “I think I’m just lucky,” she added to OK! “I also try to get enough sleep and always wear moisturizer, sunscreen, and night cream. I can’t tell you what brand because I don’t get paid for advertising it!”