First wife Judith Campbell Exner professed to be a mistress of President John F. Kennedy. She was also involved with Chicago Mafia boss Sam Giancana during the period she claimed to be Kennedy's mistress.
Brother of Robert Campbell and R. Wright Campbell.
Was the first actor ever to sing with Elvis Presley in a motion picture (Love Me Tender (1956)).
Ex-brother-in-law of Susan Morrow and Gary Morton.
Studied acting with Uta Hagen, Daniel Mann and Herbert Berghof.
Attended Fagin's School for Drama.
Best remembered by Star Trek (1966) fans for his role as the Klingon captain Koloth in the iconic episode, Star Trek: The Trouble with Tribbles (1967).
Bore a strong resemblance to pianist Liberace.
On the original Star Trek (1966) series, he played the all-powerful alien Trelane in the episode, Star Trek: The Squire of Gothos (1967), and Klingon captain Koloth, in Star Trek: The Trouble with Tribbles (1967), both of which aired in 1967. He reprised the role of Trelane for Star Trek: Judgment Rites (1993), returned as Koloth for the 1994 Star Trek: Deep Space Nine (1993) episode, Star Trek: Deep Space Nine: Blood Oath (1994), and was a regular at Star Trek conventions and cruises.
During and following his acting career, he worked with the Motion Picture & Television Fund, and at one point was its administrator and chief fundraiser. He died at age 87 in 2011, at the Motion Picture & Television Fund's hospital in Woodland Hills, CA.
Ex-wife Judith Campbell Exner also was a lover of Frank Sinatra's, who introduced her to both President John F. Kennedy and Mafia boss Sam Giancana. Even more, according to the New York Times, she arranged meetings between the president and the Chicago mob boss.
Following his death, he was interred at Forest Lawn Memorial Park in Los Angeles, CA.
Was best man at James Doohan's 1974 marriage to Wende Doohan.
Enlisted in the US Navy and served in the Pacific Theater during World War II. He served on a minesweeper, and was in the Japanese cities of Hiroshima and Nagasaki less than a month after both were destroyed by atomic bombs.
Was left handed.