On 1931 she was a stand-in for her sister Rakel Linnanheimo in Jääkärin morsian (1931). She was brought to the set on Santahamina, Helsinki, from the middle of a lesson at her school. Later she stated that it was one of the most memorable moments of her movie career. Then she was certain that she wanted to be an actress especially in the movies.
Finnish National Audiovisual Institute (KAVI) named its new movie theatre, opened in 2019, 'Kino Regina', honoring Regina Linnanheimo.