Salma Hayek Stuns at UK "Eternals" Premiere

Salma Hayek attended the United Kingdom premiere of her new movie, Marvel's Eternals, along with the rest of her co-stars. Hayek stunned in a one-shoulder, red and black striped, sequin dress. Hayek has long been considered one of the most beautiful female celebrities, and still looks incredible, despite being in her 50s. Read on to see 5 ways Salma Hayek 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!

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Hayek is a fan of the popular diet secret of juicing. In fact, she loves juicing so much, she helped found a juice company called Cooler Cleanse. On the Cooler Cleanse website, Hayek revealed that she's been juicing for 15 years, and that it's really helped her. "When I feel stressed, I turn to food for comfort," she says. "After doing a juice cleanse, I'm motivated to eat healthier and not emotionally. Cleansing is like my meditation. It makes me stop, focus and think about what I'm putting into my body. I'm making a commitment to my health and hitting the reset button."

Hayek's trainer, Sara Shears, tells Shape that the actress has a lot of drive and always works hard when it comes to fitness. She says, "Salma is super smart and has so much drive! She always puts all her effort into her workouts and that's the reason she gets results. I can't say enough good things about her."

Hayek's trainer, Sara Shears, says that she likes to do a lot of different workouts with the actress. "We did a lot of kickboxing, dance type workouts with strength training and ball work," Shears says to Shape. "We'd build up cardio and high-intensity interval training with exercises that really bring the heart rate up. Salma is super petite, so adding in the strength training really gave her some nice muscle definition and lines to accentuate the beautiful body she was born with."

Hayek says one of her secrets to staying healthy is having good posture, and that she works with a specialist to help her learn the best ways to maintain it. "I work with a woman in London who taught me how to hold my body in a way where the muscles are activated all day long," Hayek says to People. "So even when you brush your teeth, you're working the muscles." Hayek also says that her specialist taught her to work her muscles all day, without getting sore. "It's restorative yoga," she explains. "She taught me to tone [my muscles] without clenching them. You relax them and focus on the parts that need to be used, but never with tension. If you're aware of your body, you'd be surprised by the effect it can have."

When it comes to anti-aging secrets and wellness secrets, Hayek says she avoids things like botox. Instead, she prefers to get massages, and says that they have a lot of benefits for her body. "Massage oxygenates, activates the circulation, and keeps the muscles healthy and firm. I cannot tell you, even just for the lymphatic [system], what the massage does for the face," Hayek said to the Inquisitr.