Bill Cosby through the years in pictures

Bill Cosby as Billy Foster and Sidney Poitier as Clyde Williams in the 1975 film "Let's Do It Again."  (Photo by Film Publicity Archive/United Archives via Getty Images)

Comedian Bill Cosby performs live in Las Vegas circa 1970. (Michael Ochs Archives/Getty Images)

Bill Cosby as Alexander "Scotty" Scott  and Robert Culp as Kelly Robinson in Season 1 of "I Spy."  (Herb Ball/NBCU Photo Bank/NBCUniversal via Getty Images via Getty Images)

Arte Johnson, Betty White and Bill Cosby in the TV show "Cos" in 1976.  (Walt Disney Television via Getty Images)

Diana Ross and Bill Cosby performing a sketch in the TV special "Diana!" in 1971.  (Walt Disney Television via Getty Images)

Bill Cosby with two Emmy Awards at  The 22nd Annual Emmy Awards at the Century Plaza Hotel, Los Angeles, California, on June 7, 1970.  (Walt Disney Television via Getty Images)

Bill Cosby in a publicity portrait for the television series "I Spy," circa 1966.  (Silver Screen Collection/Getty Images)

Bill Cosby on a float with the parade queen in Watts, Los Angeles in December 1966.  (Max B Miller/Fotos International/Getty Images)

Rita Moreno and Bill Cosby filming the "Cosby Mysteries" television show.   (Harry Hamburg/NY Daily News Archive via Getty Images)

Bill Cosby in a publicity photo for "The Bill Cosby Show," which ran from 1969-71. (Getty Images)

Phylicia Rashad as Clair Hanks Huxtable and Bill Cosby as Dr. Heathcliff "Cliff" Huxtable in "The Cosby Show."  (Al Levine/NBCU Photo Bank/NBCUniversal via Getty Images via Getty Images)

"Blue Note Celebrates Song" with Bill Cosby as emcee and Audra McDonald, who sang in the show. (Richard Corkery/NY Daily News via Getty Images)

Bill Cosby during an interview with host Jay Leno on "The Tonight Show" on Jan. 29, 2007.  ( Paul Drinkwater/NBCU Photo Bank/Getty Images)

Bill Cosby performs on "The Tonight Show" with Jay Leno on May 17, 2010   (Bank/NBCUniversal via Getty Images via Getty Images)Bank/NBCUniversal via Getty Images via Getty Images)

Patti LaBelle and Bill Cosby attend the 5th annual Jumpstart Read for the Record Day at Rockefeller Center on Oct. 7, 2010 in New York City.   (Jason Kempin/WireImage for Jumpstart/Getty Images)

Bill Cosby performs at the Fred Kavli Theatre on Sept. 28, 2014 in Thousand Oaks, California.   (Jeff Golden/WireImage/Getty Images)

Bill Cosby performs at the Hard Rock Hotel, Nov. 17, 2003.  (Kim Kulish/Corbis via Getty Images)

Bill Cosby performs during a special performance to honor jazz musician Tony Williams at LaRosa Jazz Club on Jan. 22, 2018, in Philadelphia, Pennsylvania.  (Getty Images)