Bert Karlsson | Stefan Karlsson | Bajina Bašta | Sofia Karlsson | Karlsson-on-the-Roof | Giorgio Basta | Ya Basta Association | ¡Ya basta! | Stefan Basta | Sofia Karlsson (singer) | Nils Karlsson | Minnah Karlsson | Mattias Karlsson | Karlsson | Hennes bästa | David Karlsson | ¡Basta Ya! | Bästa vänner |
Jan Nils Johan Nygren (born 10 April 1934) is a Swedish actor, well known for his role as Karlsson (Karlsson's voice) in Karlsson-on-the-Roof.
A live-action version, Världens bästa Karlsson, was released in Sweden 1974, followed by a more recent animated film released in 2002.