Oskar H. Olsson grew up in Säffle, Värmland and quickly found his way to SäffleOperan's stage, where he participated since childhood. As an 11-year-old, he made his debut role as Oliver Twist in Oliver! at SäffleOperan in 2007. Since then he has appeared in a number of productions at the theatre, including Zorba, Cabaret, The Beggar's Opera, Beauty and the Beast, The Producers, My Fair Lady, Fiddler on the Roof and Chess in Swedish. Currently Oskar also works as a producer and has produced shows such as Så som i Himmelen and Kinky Boots.
Oskar H Olsson graduated at the Balettakademien Gothenburg in 2022. At the Göteborg Opera he has performed the role of Boq in Wicked during season 2023/2024.