The dancer and choreographer, first tweeted about veganism last year after he reached out to the Vegan Society. More recently, the star's announced he's trying to 'go vegan' for a month.
"I've been reading so much on the benefits of a plant-based diet and I have cut down on eating meat and feel so much better.
"I am going to try going vegan for a month. Has anyone tried it? Any advice? #vegan #plantbased," Tonioli wrote.
The tweet, which gained nearly 400 likes and 17 retweets, caught the attention of fellow TV personality, Kristina Rihanoff, who said: "Aww amazing news! So glad you trying it. You can get amazing cooked vegan meals at http://allplants.com they deliver to your door."
Animal-rights organization also responded to the tweet, saying: "There are so many benefits to enjoy! You'll LOVE the way #VeganLife feels. We're here with all the advice and motivation you need," and attached a two-week vegan meal plan.
Tonioli also quote retweeted an article claiming 92 percent of plant-based meals were consumed by non-vegans, adding: "I am one of them," along with a heart-face emoji, to his 193,000 followers.