VIDEO : Mark Ruffalo And Robert Downey Jr. Pose For Science Bros Selfie

The Marvel Cinematic Universe's Science Bros. have reunited for a photo on the set of Marvel Studios' biggest ensemble yet. In a photo posted to Bruce Banner actor Mark Ruffalo's Instagram page, he and Tony Stark actor Robert Downey Jr. are seen hanging out on set of Avengers: Infinity War. The film is set to be the reunion of the characters who developed a close relationship throughout the previous two Avengers movies before Banner decided to literally jet off of Earth.