Stewart died in Los Angeles after living with Alzheimer's disease and Lewy body dementia. Hollywood remembered Sir Patrick Stewart following his death at 86. Hugh Jackman, Ian McKellen, Rebecca Romijn, Famke Janssen, Kelsey Grammer, Kevin Feige, William Shatner and other. Los Angeles: Actor Patrick Stewart, widely celebrated for his iconic portrayals of Captain Jean-Luc Picard in Star Trek: The Next Generation and Professor Charles Xavier in the X-Men film.