Reeve's three children, Alexandra Reeve, Matthew Reeve, and Will Reeve, an ABC News correspondent, told "Good Morning America" on Wednesday at the premiere that the film is a tribute to their father's legacy and the lasting impact he had on who they are today.

Reeve died at 52 in 2004, just under one decade after his life-changing fall in 1995. His wife Dana, with whom he shared Will, died two years after Reeve passed away. Reeve shared his older two children with ex-partner Gae Exton, who also appears in the new documentary.

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