Harthacanute (Canute the Hardy, sometimes Hardicanute, Hardecanute; Danish: Hardeknud) (1018 – June 8, 1042) was King of Denmark from 1035 to 1042 and England from 1040 to 1042. He was the only son of Canute the Great and Emma of Normandy. He succeeded his father as King of Denmark in 1035, reigning as Canute III, but conflict with Magnus I of Norway prevented him from sailing to England to secure his position there. Consequently, it was agreed that his elder illegitimate half-brother Harold Harefoot would be regent in charge of England.