| Sergei Prokhanov | |
| Honorific Suffix: | PAR |
| Birth Name: | Sergei Borisovich Prokhanov |
| Birth Date: | 29 December 1952 |
| Nationality: | Soviet Union (1952–1991)Russia (1991–) |
| Birth Place: | Moscow, Russia |
| Years Active: | 1970–present |
| Alma Mater: | Boris Shchukin Theatre Institute |
| Spouse: | Tatyana Prokhanova[1] |
Sergei Borisovich Prokhanov (ru|Серге́й Бори́сович Проха́нов; born December 29, 1952[2]) is a Soviet and Russian theater and film actor, theater director, artistic director of . People's Artist of the Russian Federation (2005).[3] The most famous for him was the role Kesha Chetvergov in the Vladimir Grammatikov's comedy Mustached Nanny (1977).[4] [5]