About Pernell Roberts
Pernell Elven Roberts Jr. was an American stage, film, and television actor, activist, and singer. In addition to guest-starring in over 60 television series, he was best known for his roles as Ben Cartwright's eldest son Adam Cartwright on the Western television series Bonanza (1959–1965), and as chief surgeon John McIntyre, the title character on Trapper John, M.D. (1979–1986). Roberts was also known for his lifelong activism, which included participation in the Selma to Montgomery marches in 1965 and pressuring NBC to refrain from hiring white actors to portray non-white characters. Roberts and his first wife later divorced. He won a Drama Desk Award in 1955 for his performance in an off-Broadway rendition of Macbeth, which was followed by the role of Mercutio in Romeo and Juliet.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.