Avengers: Endgame cast singing Happy Birthday on Iron Man's 11th birthday is pure love


Yesterday, May 2, 2019, marked exactly 11 years since Robert Downey Jr first donned the red and gold armour of Iron Man and the star found the perfect way to celebrate this feat.

Robert took to this official Instagram account to share a BTS video of the Avengers: Endgame cast singing the Happy Birthday song along with him for his on-screen character, Iron Man. He captioned the video, "#Happy 11th #Birthday to the 1st #IronMan film, released on this day in 2008... #TeamStark #thankyou". 

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The video also featured Chris Pratt, Paul Rudd, Elizabeth Olsen, Chris Evans, Chadwick Boseman, Chris Hemsworth and more in their on-screen personas. It appeared that the video had been filmed on the sets of the recently released Avengers: Endgame

Luckily for fans, after the much-anticipated release of the film, the cast and crew have been sharing BTS footage from the making of the film.