Key Facts

• Stewart died at his home in Los Angeles, the statement said.
• The statement said he died after a brief illness involving Alzheimer’s disease and Lewy body dementia.
• His wife, Sunny, was with him, according to the statement.
• Stewart was born in Yorkshire, in northern England.
• He performed with Britain’s Royal Shakespeare Company before building a career on U.S. stages and screens.
• He played Captain Jean-Luc Picard in “Star Trek: The Next Generation.”
• He played Professor Charles Xavier in several “X-Men” and related Marvel films.