Patrick Stewart, the classically trained stage actor who scaled the Shakespearean canon and added gravitas to a “Star Trek” franchise and the “X-Men” films, has died. He was 86. A spokesperson said Stewart died Wednesday in Los Angeles, following “a brief and poignant journey” with Alzheimer’s disease and Lewy Body Dementia. Stewart was best known as Professor Charles Xavier from the “X-Men” and Captain Jean-Luc Picard from “Star Trek: The Next Generation,” but he spent more of his career onstage than in the X-Mansion or on the USS Enterprise.

Patrick Stewart has died at 86, prompting tributes from colleagues and Marvel Studios. Known for roles as Capt. Jean-Luc Picard in “Star Trek” and Professor Charles Xavier in “X-Men," Stewart died Wednesday in Los Angeles after a “brief and poignant journey” with Alzheimer’s and Lewy Body Dementia. William Shatner called him a friend and magnificent actor. Hugh Jackman described him as a great friend and mentor. Kevin Feige praised his brilliance and warmth. George Takei and Seth MacFarlane also shared heartfelt tributes. Stewart’s legacy lives on through his extraordinary work and the many people he inspired.

Country music star is teaming up to fight against Alzheimer's and dementia.