This is TOO CUTE!
Mark Ruffalo's son is wearing a Hulk tee-shirt to honor is Avenger daddy.
Mark and Keen his 11-year-old son, Keen, looked ready to have some fun in the sun, Sunday.
The two Ruffalos were sporting flip-flops and some causal shorts as they walked down the streets of NYC, perhaps on there way to spend a father son day at the park.
Whatever they're up to, one this is clear: Keen really looks up to his dad!
[Image via FameFlynet Pictures.]