Former President Bill Clinton said he was interviewed by King more than 20 times and remembered him as having "a great sense of humor and a genuine interest in people."
Singer and actress Bette Midler said King was "a great interviewer and a great listener."
"He always made me feel as though I were the only person in the room," Midler added.
Actress and producer Reese Witherspoon recalled being "lucky enough to be interviewed by him and see his unique interview style first hand."
"He was a deeply thoughtful, intelligent, kind man," Witherspoon said.
Basketball legend Earvin Magic Johnson said he loved being interviewed by King, who was "always well prepared, asked intelligent questions, & always made the interviews fun, serious, & entertaining!"
CNN Chief International Anchor Christiane Amanpour posted a remembrance of King, who hosted "Larry King Live" on CNN for 25 years. Amanpour called King "a giant of broadcasting" whose "name is synonymous with CNN."
CNN's Artemis Moshtaghian contributed to this report.