Mark Ruffalo has always been a cutie!

The "Spotlight" star stopped by "The Tonight Show Starring Jimmy Fallon" on Thursday, where the comedian surprised Ruffalo with a clip of one of his first acting gigs.

Check out the video above to see the Mark's hilarious 1989 Clearasil commercial!

In the ad, the now 48-year-old Oscar-nominated actor is just a teenager -- and a super cute one at that -- as he shows off his pimple-free face.

0108_mark_insetLaunch GalleryThe Tonight ShowSee More Child Stars -- Then & Now!

"The director said, ‘Yeah, I really, really liked what you did. You just seemed like you came right off the street and you don’t know how to act at all,'” Ruffalo told Jimmy about the gig.

"Well that director should watch any of the things you’re doing right now," Fallon said.

Obviously, the "Avengers" star has come a long ways since his Clearasil commercial days! What do you think about Mark's adorable ad? Sound off below and check out the gallery above to see more child stars then and now!

Hot Videos