Plant-based documentary What The Health has made waves since its release on Netflix - and now it has won more celebrity fans.
Singer Cyrus wrote: "Watching What The Health with my puppies and I am so proud to call myself vegan!
"By not consuming animal products over the years I have protected myself from preventable diseases and saved the valuable lives of animals that would be turned into breakfast/lunch/dinner.
"Think before you eat! Go vegan!"
Hemsworth, who is famous for his role in the Hunger Game films, added: "If you care about your health, animal welfare or the planet we all live on, you must watch this documentary.
"If you don't care, you should still watch it."