By Josephine Cusumano
Updated Apr 04, 2017 @ 8:00 am

Our favorite superhero/funnyman is celebrating his 52nd birthday! The one and only Robert Downey Jr., is ringing in his special day today and we're honoring the big event with 9 of the Iron Man star's most humorous social media moments to date.

When Downey isn't dressed up as the iconic superhero, a role he'll be reprising next year in Avengers: Infinity War, he's giving back to his community and fans—like the time when he presented a 3D-printed, real-life bionic arm to a 8-year-old boy with a partially developed limb—and of course, being a father. The star shares 23-year-old son Indio with ex Deborah Falconer, and he and wife Susan Downey are also proud parents to 5-year-old son Exton and 2-year-old daughter Avri.

While Downey typically keeps his personal life just that, he's more than willing to divulge details about his work. In fact, he confirmed that an Iron Man 4 will happen in the future. Until then, take a look back at nine of Downey's funniest moments in honor of his birthday: