He went on to win a Tony Award for his 1962 Broadway show How to Succeed in Business Without Really Trying and was nominated for numerous others, before becoming a regular on quiz shows such as Hollywood Squares and Match Game.
In 2001 the star, who was also a regular on Johnny Carson's Tonight Show, admitted his appearances on such shows left him typecast, saying, "You can't do anything else once you do game shows. You have no career."
Reilly's partner, Patrick Hughes, confirmed details of his death on Friday following a yearlong illness.
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