His best known roles were that of the prospective father-in-law, Burt Johnson, in the hit 1981 film Arthur and as Chief Hubbard in the 1984 blockbuster Beverly Hills Cop.

[1] After serving in World War II with the United States Merchant Marine, he started a successful career on Broadway with his debut in Shakespeare's The Tempest; two years later, Elliott was selected by Robert Lewis to be one of The Actors Studio's founding members.

Elliott's television credits include the role of Jane Wyman's first husband, newspaper publisher Douglas Channing, in Falcon Crest, General Padget in Columbo, Harold W. Smith in the 1988 television adaptation of Remo Williams, Texan millionaire attorney Scotty Demarest in Dallas, and Judge Harold Aldrich in Chicago Hope.

In 1981, Elliott played the role of Bail Organa, father of Princess Leia, in the radio drama adaptation of Star Wars.

Hirson appeared for several seasons in a recurring role as Mavis Anderson, close friend of Ellie Ewing Farlow, on the television series Dallas, although her character never interacted with Elliot’s Scotty Demerest.