Sten Ivar Ljunggren (born October 16, 1938) is a Swedish character actor. He played Henrik in the long-running Swedish drama TV series Svenska hjärtan, which aired between 1987 and 1998. Other notable roles includes criminal inspector Lennart Thorin in the TV mini-series based on the Lasermannen events, the retired doctor Axel Holtman in Skärgårdsdoktorn, the voice of Carl Fredricksen in the Swedish dub of Up, the voice of Sykes in the Swedish cinema dub of Oliver & Company, and the evil principal in Kenny Starfighter.

He played the lead role as Birger in Lukas Moodysson's last short film Talk. The same character, with some modifications, was used again in Moodysson's Together. Ljunggren reprised the role.