
If we were to come across Paul Rudd or Robert Downey Jr. or Emma Stone in the wild, we'd probably react exactly like Mark Ruffalo does—except for the fact that, like them, he's a huge Hollywood star. That hasn't stopped Poor Things' resident rake from going full-blown fanboy in the presence of his celebrity co-stars.
An adorable video of Ruffalo's fanboy behavior over the years is going viral on Instagram, featuring the actor's humorous reactions to seeing the likes of his fellow Avengers stars (Paul Rudd, Chris Hemsworth), his The Adam Project co-star Ryan Reynolds, his frequent screen partner Robert Downey Jr. (Zodiac, the MCU) and his current leading lady, Poor Things' fearless Emma Stone. Check out the video below: