Jack Paar was an American entertainer and television talk show host who is widely credited as the pioneer of late-night talk shows. He hosted 'The Tonight Show Starring Jack Paar' from 1957 to 1962, and his wit and humor made him a popular figure in the entertainment industry. His show featured interviews with celebrities, musical performances, and comedy sketches. Paar's influence on late-night talk shows can still be seen today.