Axa Regina Elisabeth Linnanheimo (until 1924 Leino, since 1948 Regina Mörner, 7 September 1915, Helsinki – 24 January 1995) was a Finnish actress and screenwriter. Her sister Rakel Linnanheimo (1908–2004) was also an actress. Linnanheimo was married to Count Carl Robert Mörner 1948–1952, until his death. After she ended her film career in 1956, she started to work as a translator for the Finnish Broadcasting Company using the name Regina Mörner.
Regina Linnanheimo was one of the stars of the so-called golden era of Finnish movies. She specialized in romantic and historical costume films and melodramas, such as Kulkurin valssi (1941) and Katariina ja Munkkiniemen kreivi (1943). On the other hand, Linnanheimo showcased her tendencies for darker undertones in several Teuvo Tulio films. The two collaborated frequently, with Linnanheimo often serving both as an actress and a screenwriter. In 1946, she received a Jussi Award for Tulio films Levoton veri and Rakkauden risti. Olet mennyt minun vereeni (1956) was their last film together and also the final film of Linnanheimo's career.