Christopher Reeve’s son is “proud” of his mother Gae Exton for opening up about her late ex in a poignant new documentary about the actor’s tragic life. Matthew Reeve, 44, spoke out at the New York City premiere of ‘Super/Man: The Christopher Reeve Story’,

Christopher Reeve is the perfect Clark Kent / Superman, and no matter how hard any actor tries, no one will be able to bring to the character what Reeve brought to him. It was truly something special,

Christopher Reeve's children Alexandra, Matthew and Will were a united front at the New York premiere of the documentary honoring their late father. See all the red carpet photos

Armed with home videos and interviews with Reeve's family and closest friends, "Super/Man: The Christopher Reeve Story" gives a powerful and honest look at the man who played a hero, and then became one after a devastating horse-riding accident left him paralyzed nearly 30 years ago.

Very few actors embodied the role of a superhero quite like Christopher Reeve. For generations of movie-loving audience members, Reeve was – and is – Superman. He first stepped into the iconic DC role in 1978’s aptly titled Superman,

The late Christopher Reeve's children stepped out together for the premiere of "Super/Man: The Christopher Reeve Story," which explores the legacy of their beloved father. The documentary follows Christopher Reeve's life as he became the iconic "Superman" character and after he was paralyzed in a near-fatal horse-riding accident in 1995.

Christopher Reeve's son Will Reeve was supported by his GMA co-stars including Robin Roberts and Lara Spencer at the premiere of Super/Man: The Christopher Reeve Story