Johnny Carson

Johnny Carson watches a tennis match between Mary Pierce of France and Martina Hingis of Switzerland during the Canadian Open in Toronto on Aug. 17, 1995.

In this May 22, 1992, file photo, talk show host Johnny Carson, right, appears with the show's announcer Ed McMahon during the final taping of the "Tonight Show" in Burbank, Calif.

Johnny Carson, comedian and host of "The Tonight Show," is shown in 1962 at an unknown location.

Johnny Carson works on his monologue to open "The Tonight Show" in his office at the NBC-TV studios in New York City, March 22, 1963.

Journalist Mary Wood interviews talk show host, Johnny Carson in this undated file photo, date unknown. Wood, who was among the first critics of commercial television as it debut in the 1940's.

Television talk show host Johnny Carson, who is also an amateur astronomer, poses with his telescope, which is set up in the backyard of his home in Los Angeles, March 19, 1979.

Lillian Carter, left, U.S. president's mother, puts her hands to her face as she laughs during an interview with talk show host Johnny Carson on the "Tonight Show" in Burbank, Ca., June 21, 1979.

Johnny Carson, king emeritus of late-night television, is shown with sidekicks Doc Severinsen, left, and Ed McMahon during the final taping of his "Tonight" show in Burbank, Calif. May 22, 1992.

A misty eyed Johnny Carson, the king of late night, applauds his friends and family in the audience May 22, 1992 at the close of the Tonight Show after 30 years on the air.

The five individual recipients of the Kennedy Center Honors of 1993 pose Dec. 4, 1993. Standing from left are, founder of the Dance Theater of Harlem Arthur Mitchell, entertainer Johnny Carson, composer-lyricist Stephen Sondheim; sitting from left are, conductor Georg Solti and singer Marion Williams.

Former "Tonight Show" host Johnny Carson and wife, Alexis Maas, watch Andre Agassi of Las Vegas play Lleyton Hewitt of Australia in a quarterfinal match Friday, July 30, 1999, at the Mercedes-Benz Cup in Los Angeles. Hewitt was unable to continue after twisting his left ankle in the first set, trailing 4-5.