Robert Guillaume radiated such warmth, light, dignity, and above all, class.
That smile and laugh touched us all.
RIP to the best boss ever, wrote Charles on Twitter.

Credit: Michael Kovac/WireImage
Saw him play Nathan Detroit on Broadway in 1976.
Made me want to be an actor.
It was a thrill to work w him on SN, read Malinas tweet.
Check out some of the other celebrity reactions to Robert Guillaumes death below.