Comedian Joan Rivers poses for a portrait, circa 1965 in New York City. James Kriegsmann/Michael Ochs Archives, via Getty Rivers with Ed Sullivan on The Ed Sullivan Show, Sept. 11, 1966. CBS Photo Archive/Getty An image from Kraft Music Hall, in August 1968. NBC/Getty Producer Edgar Rosenberg and wife, Joan Rivers, during the 10th anniversary party for The Tonight Show Starring Johnny Carson on Sept. 30, 1972. NBC/Getty Rivers with Tonight Show host Johnny Carson on Oct. 5, 1976. Ron Tom/NBC, via Getty Joan Rivers in Chicago on Feb. 5, 1983. Paul Natkin/WireImage, via Getty Rivers, as guest host of The Tonight Show, interviews Oprah Winfrey on Jan. 27, 1986. Paul Drinkwater/NBC, via Getty Rivers and RuPaul during a taping of The Joan Rivers Show at CBS Broadcast Center in New York on July 28, 1993. Ron Galella, Ltd./WireImage, via Getty Rivers and daughter Melissa on the red carpet at the 77th Annual Academy Awards on Feb. 27, 2005. Carlo Allegri/Getty Rivers, Kelly Osbourne, George Kotsiopoulos, and Giuliana Rancic on Fashion Police during the 2013 season. Brian Bowen Smith/E! Rivers on Fashion Police during the 2013 season. Brian Bowen Smith/E!