Mark Ruffalo Reacts to Noah Centineo Comparisons - Watch!

Mark Ruffalo is responding to comparisons to Noah Centineo!

The 51-year-old Avengers actor made an appearance on The Tonight Show Starring Jimmy Fallon on Wednesday night (March 13).

PHOTOS: Check out the latest pics of Mark Ruffalo

During his appearance, Mark discussed comparisons to the 22-year-old To All The Boys I’ve Loved Before heartthrob, and how he really feels about people saying Noah looks like a younger him.

He also revealed how much trouble he got into for Avengers spoilers during his last appearance on the show.

Watch his appearance below!