Aarre Karén was a Finnish actor who performed in theater, films and television. Karén played his first major film role in The Gauntlet (1971), directed by Maunu Kurkvaara. Karén's film career spanned 47 years, during which he appeared in many of Spede Pasanen's Uuno Turhapuro films. He also played voice roles in several popular animated films and series dubbed into Finnish, such as Rabbit in the Winnie the Pooh, Joker in Batman and Abraham Simpson in The Simpsons movie. Karén's last film role was in 21 Ways to Ruin a Marriage (2013), directed by Johanna Vuoksenmaa.

Actress Linnea Skog is Karén's granddaughter.