Robert Plunket (born 1945) is an American author, actor and screenwriter. Plunket is primarily known as an author but also had a brief career as an actor, appearing in Martin Scorsese's After Hours (1985), Insomnia (1994) and Autumn in New York (2000). He also co-wrote Insomnia (1994).

Plunket was born in Greenville, Texas and raised in Havana and Mexico City. After his short stint as an actor in New York, he moved to Sarasota, Florida, where he became Mr. Chatterbox, the gossip columnist for Sarasota Magazine. He is now retired and has “found peace and contentment at a lovely trailer park in Florida.” New Directions publishes his novels Love Junkie and My Search for Warren Harding, described by Danzy Senna in the foreword as “one of the best, and most invigorating books I’d read in years, and certainly the funniest.”