Chester Lee "Chet" O'Brien (June 28, 1909 – July 14, 1996[1][2][a]) was an American chorus dancer in the 1930s who became a stage manager.

[5] In the early 1950s O'Brien worked for CBS as a stage manager on the Arthur Godfrey shows.

[3] He was stage manager on Rumple (1957), The Most Happy Fella (1959), Finian's Rainbow (1960) and Brigadoon (1963).

[8] Chet O'Brien appeared as "Mr Macintosh", a fruit and vegetable vendor, on Sesame Street in various episodes between 1975 and 1992.

[4] Chester O'Brien is listed among the 2010 Permanent Memorials of the Actors Fund of America.