Sven Olaf Bjarte Høiby (14 November 1936 – 21 March 2007) was a Norwegian convicted felon and the father of Crown Princess Mette-Marit of Norway.

In his younger years he had briefly worked as a journalist with a local paper in his hometown of Kristiansand, but he was on welfare when he became nationally known as the father of Mette-Marit, and had been convicted twice of violence.

[1] After his daughter married the Crown Prince, he became a national celebrity due to his years-long cooperation with the yellow press, especially Se og Hør, and his subsequent marriage to a stripper.

During this period he made several outspoken comments, and he announced that he was writing a book about Mette-Marit's young son, Marius, her child from a previous relationship.

[5] Father and daughter had reportedly reconciled some time before his death and he was, among other events, invited to attend the baptism of his granddaughter, Princess Ingrid Alexandra, in 2004.