Mark Ruffalo reminisces Avengers days on Robert Downey Jr’s birthday: Watch

Mark Ruffalo wished his friend and Marvel costar Robert Downey Jr on his birthday with a 'filmy' twist.

Robert, who is known for his role as Tony Stark (also known as Iron Man) turned 57 on April 4 and the Hulk actor took to Instagram to share a throwback clip of the two from their days promoting Avengers: Age of Ultron.

Mark, who called Robert his ‘science brother for life, wrote in the caption, “Wishing a happy birthday. Hope you enjoy your day Old Pal.”

On the work front, Mark is rejoicing the success of his new venture The Adams Project that is streaming on Netflix.

Meanwhile, Robert, on the other hand has several upcoming projects in the pipeline including Christopher Nolan’s Oppenheimer and the HBO series The Sympathizer.