The 62-year-old actor insisted on getting up at the podium to present the award to Oppenheimer, played by Christopher Nolan, despite entering the stage in a wheelchair.
Social media users shared on social media that they were crying when they saw perform, and he was met with a standing ovation.
He was given a diagnosis in the 1990s and doesn’t often appear in public.
Though it was nominated for best documentary, Davis Guggenheim’s Still: A Michael J. Fox Movie came up short against 20 Days In Mariupol.
David Tennant, presenter of the Bafta awards, referred to the Canadian-American actor as a “true legend of cinema” as he was brought onto the stage at the Royal Festival Hall in London.
Fox referred to the best film candidates as “magic” that might “change your life” when introducing them.
“There is a commonality among the five films that received nominations for this category tonight,” he stated. They represent our best work to date.”