Career
He worked on Oh! Calcutta! and on Sesame Street, where he also performed as "Mr. Macinstosh". He was an ensemble performer in Jonica in 1930, a performer in Fine and Dandy (1930-1931) and a performer in Who's Who (1938). The marriage does not seem to have been happy.
Miller died on 7 April 1936 from complications after nasal surgery. Chet O'Brien was stage manager on Keep Off the Grass (1940). In the early 1950s O'Brien worked for CBS as a stage manager on the Arthur Godfrey shows.
In December 1954, it was reported that he was leaving Columbia due to a pay cut. He was stage manager on Rumple (1957), The Most Happy Fella (1959), Finian's Rainbow (1960) and Brigadoon (1963). In 1967 he was stage manager on the TV show Mark Twain Tonight!.
In 1972 he was stage manager on Oh! Calcutta!. Chet O'Brien appeared as "Mr Macintosh", a fruit and vegetable vendor, on Sesame Street in various episodes between 1975 and 1992. Chet O'Brien is listed among the 2010 Permanent Memorials of the Actors Fund of America.