Veteran actor Sir Patrick Stewart will make his final on-screen appearance as Professor Charles Xavier, popularly known as Professor X, in Marvel Studios’ upcoming film Avengers: Doomsday. The announcement follows the actor’s death at the age of 86 on October 28, 2026, at his home in Los Angeles. His representative said he had experienced a brief illness involving Alzheimer’s disease and Lewy body dementia.

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Marvel Studios confirmed Stewart’s final appearance in a tribute following his death, remembering his contribution to the X-Men franchise and the lasting impact of his portrayal of the powerful mutant and mentor. Stewart first played Professor X in the 2000 film X-Men and returned to the role across several instalments, including X2: X-Men United, X-Men: Days of Future Past and Logan. Avengers: Doomsday will mark his ninth big-screen appearance as the character, according to reports. 

In one of his final interviews, published in July 2026, Stewart spoke about his continuing enthusiasm for acting. Reflecting on the opportunities available to older performers, he said he could not imagine officially retiring and would “always and forever be an actor.” The remark has taken on added significance following news of his death and confirmation that audiences will see him in one final screen performance. 

Beyond the X-Men films, Stewart became widely known for playing Captain Jean-Luc Picard in Star Trek: The Next Generation. His career also included decades of theatre work, particularly with the Royal Shakespeare Company, alongside film, television and voice performances. His stage background helped establish him as a performer whose work extended well beyond science-fiction franchises. 

Avengers: Doomsday, directed by Joe and Anthony Russo, is scheduled to arrive in US cinemas on December 18, 2026, with its Indian theatrical release reported for December 17. Stewart’s return as Professor X gives the upcoming Marvel film additional significance for fans reflecting on his long career and the characters he helped bring to life.