Sven Bert Jonas Karlsson is a Swedish actor and author. Karlsson was born in Salem. He won a Guldbagge Award for Best Actor in 2004 for the movie Details. He published his first book, a collection of short stories, in 2007. He wrote three short novels that were translated into English: The Room, The Invoice, and The Circus. His writing often features weird characters and Kafkaesque surrealism.