Shelley became Charlie's 5th Angel in 1979. She was handpicked by Aaron Spelling for the role of Tiffany "Tiff" Welles due to her impeccable background. She was a bright young woman with a high I.Q. from upscale Greenwich, Connecticut. She had a history degree from Smith (a classy East Coast college.) And, because of her Revlon Charlie endorsements, she was already one of the most recognizable faces in the world. "We hired her 40 percent from the screen test and 60 percent from the personality test," Spelling told TV Guide, "We decided she was a nice person with sparkle and intelligence." Shelley's debut episode "Love Boat Angels" topped the Nielsen ratings when it first aired; and it looked like Charlie's Angels was in for another explosive season with the addition of this Supermodel Angel.