Aku Hirviniemi: Aku Hirviniemi. Actor: The Unknown Soldier. Aku Hirviniemi was born on 5 December 1983 in Riihimäki, Finland. He is an actor and writer, known for The Unknown Soldier (2017), Luokkakokous (2015) and Harjakainen: The Movie. He has been married to Sonja Kailassaari since 2018. They have one child. He was previously married to Niina Lahtinen.
Known For: The Unknown Soldier (Hietanen), Luokkakokous (Niklas 'Nippe' Lavonen), Harjakainen: The Movie (Timo Harjakainen), Hayflower, Quiltshoe and the Rubens Brothers (Konstaapeli Rillirousku)