Celebs Who Are Hardcore Vegan or Vegetarian

From lifelong animal-rights advocates to athletes who credit plants for peak performance, plenty of famous faces have gone all-in on vegan or vegetarian lifestyles. Some were raised this way, others made the switch after learning more about food systems, sustainability, or health, but all of them stick with it in a way that goes beyond a passing trend.

Whether they’re launching plant-based brands, funding farm-sanctuary work, or refusing leather on set and on stage, these stars show how deeply a diet choice can become a full-on ethos. Here are 15 celebrities who are truly hardcore about being vegan or vegetarian.

Joaquin Phoenix

Joaquin Phoenix has been outspoken about animal rights since childhood, and he pairs his convictions with visible, consistent action. He’s known for turning red-carpet moments into advocacy opportunities and for supporting organizations that fight factory farming and promote rescue work.

Off camera, he keeps his lifestyle tightly aligned with his principles—avoiding animal products in food, fashion, and personal care. Phoenix also encourages studios and event organizers to make compassionate choices, helping normalize plant-forward norms in Hollywood.

Rooney Mara

Rooney Mara’s approach is quiet but uncompromising. She co-founded a cruelty-free fashion line that avoids leather, wool, and silk, proving that high style and ethics can coexist.

Her day-to-day choices reflect the same ethos: plant-based meals, non-animal-tested beauty, and mindful consumption. Mara’s influence is subtle yet strong, inspiring fans to see veganism as thoughtful minimalism rather than deprivation.

Billie Eilish

Billie Eilish went vegan as a teen and has used her massive platform to nudge the industry toward better standards. On tour, she’s pushed venues and caterers toward plant-based options and raised awareness around animal testing and sustainability.

She keeps things practical, too—sharing easy swaps and comfort-food favorites so fans can try plant-based eating without intimidation. Eilish proves the lifestyle can be youthful, fun, and totally mainstream.

Lewis Hamilton

Seven-time world champion Lewis Hamilton credits a plant-based diet with sharpening recovery and performance. He’s spoken candidly about energy levels and inflammation, and he backs it up by investing in plant-based ventures and making vegan choices part of his training culture.

Beyond sport, Hamilton supports animal-welfare causes and promotes accessible, craveable plant-based fast food. His message is simple: eating this way can be elite-athlete strong and everyday convenient.

Woody Harrelson

Woody Harrelson is one of Hollywood’s most consistent plant-based voices. Long before it was cool, he was advocating for whole-food vegan diets and eco-friendly living, often encouraging co-stars to try it out on set.

His activism is matched by a grounded, approachable vibe—think farmers-market fresh, home-cooked staples, and zero-waste leanings. Harrelson shows how a vegan lifestyle can be both laid-back and deeply principled.

Paul McCartney

Paul McCartney has championed vegetarianism for decades and helped popularize meat-free culture well beyond music. His advocacy emphasizes compassion, planetary health, and the power of small weekly habits.

He embodies the long game: consistent messaging, family involvement, and practical tools that make plant-forward eating easy. McCartney’s legacy proves that gentle persistence can change global habits.

Moby

Moby’s animal-rights commitment runs so deep he’s literally tattooed it on his body. The musician funnels proceeds and time into sanctuaries, legal advocacy, and community projects focused on ending animal exploitation.

He also uses his restaurants, social media, and public talks to demystify vegan cooking and ethics. Moby’s vibe is transparent: if you can live well without harming animals, why wouldn’t you?

Mayim Bialik

Neuroscientist-turned-actor Mayim Bialik brings a research-minded clarity to vegan living. She’s shared practical guidance on meal planning, family-friendly dishes, and the science behind plant-based nutrition.

Bialik treats veganism as both compassionate and pragmatic—something you can do on a busy schedule with a realistic budget. Her advocacy is friendly, detailed, and refreshingly BS-free.

Venus Williams

Tennis legend Venus Williams adopted a plant-based regimen to support her health and performance and has stuck with it for the long haul. She often highlights how it aids recovery, stamina, and overall well-being.

Williams also stepped into entrepreneurship with a nutrition brand built around plant power. She’s living proof that elite training and a rigorous schedule can thrive on greens, grains, and legumes.

Alicia Silverstone

Alicia Silverstone turned her personal transformation into years of advocacy for animals and the planet. She’s known for approachable recipes, pantry advice, and gentle guidance for families curious about plant-based eating.

Her lifestyle extends far beyond the plate: cruelty-free fashion, eco-home habits, and a steady commitment to animal rescue. Silverstone’s consistency has helped make veganism feel cozy and attainable.

Sadie Sink

Sadie Sink discovered veganism as a young actor and embraced it wholeheartedly, quickly becoming a role model for plant-based Gen Z. She speaks about confidence, clarity, and compassion as benefits—not just diet changes.

Sink keeps it simple: familiar foods, creative swaps, and learning as you go. Her message resonates with fans who want a lifestyle that’s ethical without being complicated.

Alan Cumming

Alan Cumming approaches veganism with signature wit and warmth, tying it to kindness, sustainability, and health. He brings plant-based flair to his hospitality projects and public appearances alike.

Cumming’s advocacy style is welcoming, not preachy—he invites people to try delicious food first and let the ethics follow. The result is activism that feels like an open door, not a lecture.

RZA

Wu-Tang icon RZA has long connected plant-based living with peace and respect for life. He talks about alignment—choosing foods that match his values and creative spirit.

He also uses fashion and music platforms to spotlight cruelty-free choices. RZA’s stance is steady and spiritual: you can feed your body without compromising your conscience.

Evanna Lynch

Evanna Lynch channels her compassion into hands-on projects, co-founding a cruelty-free beauty venture and supporting sanctuary work. She emphasizes curiosity—learning about supply chains, ingredients, and impact.

Her tone is empathetic and empowering, encouraging small steps that add up. Lynch shows that vegan living can be investigative, joyful, and community-driven.

Bryan Adams

Rock legend Bryan Adams has been plant-powered for decades, crediting the lifestyle with sustained energy on tour and a clear sense of purpose. He frequently highlights how simple and satisfying the routine can be.

Adams’ feed is a steady stream of animal-friendly messaging and practical tips. His consistency over time makes him one of the most quietly influential plant-based voices in music.

Share your thoughts below: who did we miss, and which hardcore vegan or vegetarian celeb inspires you most—drop your picks in the comments!