X-15 starred which American film actor from many Marlboro commercials?
X-15 (film):  "X-15" starred David McLean, Charles Bronson, Mary Tyler Moore (in her first feature film role), Kenneth Tobey and James Gregory. David McLean (actor): David McLean (born May 19, 1922, Akron, Ohio – d. October 12, 1995, Culver City, California) was an American film and television actor, best known for appearing in many Marlboro television and print advertisements beginning in the early 1960s.
David McLean