Johan Heinrich (Joop) Doderer (28 August 1921 – 22 September 2005) was a Dutch actor, well known for his role as the tramp Swiebertje in the eponymous television series. The series ran for 17 seasons between 1955 and 1975, and was broadcast by the NCRV. Beside the role as Swiebertje, Doderer played in dozens of radio and television programs, he played the role of Alfred Doolittle in My Fair Lady, acted in Dutch and English movies, and appeared on stage in comedies, musicals, cabaret and dramas.