Pehr-Olof Sirén was born on January 10, 1923 in Porvoo, Finland as Pehr-Olof Alfred Sirén. He was an actor, known for Kaasua, komisario Palmu! (1961), Mikumärdissä on kesä (1964) and Kuukausi maalla (1964). He was married to Anja Pohjola and Kaisa Annikki Anttila. He died on November 24, 1986.