Jacob Tremblay just wants to make the world smile for World Kindness Day

You can't not smile while talking to Jacob Tremblay.

The 11-year-old actor -- a 2016 Critics' Choice winner and one of the busiest people (of any age!) in Hollywood -- is as well-spoken as he is adorable, and he's chosen a particularly fitting campaign to join this holiday season: Jacob, who stars in the uplifting new flick "Wonder," is encouraging you, me and all of his friends to take part in World Kindness Day.

"Kindness is just doing whatever you can to make someone else's day better, whether it's by including someone or just smiling," Jacob told AOL. "You smile to someone, they smile to another person and it goes on and on and on."

He teamed up with Crest to help spread the word to both #ChooseSmiles and #ChooseKind. Jacob himself didn't need the reminder to stay smiley on set of "Wonder," where he was thrilled to work along some special co-stars. No, not Julia Roberts and Owen Wilson:

"I was really excited to be a part of it because, well, I mean, I usually don't work with a lot of kids on set, and this movie was really exciting because there were lots of kids," Jacob explained. "We were all friends, and it's funny because the director, Steven [Chbosky, who wrote and directed "The Perks of Being a Wallflower], and producers called us all the Great Eight. Because there's eight of us, and we're great, so it's like, the 'Great Eight.'"

Catch Jacob in "Wonder," in theaters now, and while World Kindness Day has technically passed -- it was on November 13 -- there's no harm in celebrating it every day, right?