Katja Elina Kallio (born 17 September 1968) is a Finnish novelist, screenwriter, and columnist.

[1] Her novels include, Kuutamolla in 2000, Sooloilua in 2002, Karilla in 2008, Syntikirja in 2009, Säkenöivät hetket in 2013, Yön kantaja in 2017, and Tämä läpinäkyvä sydän in 2021.

[3][4] It was directed by Aku Louhimies, and starred Minna Haapkylä, Anna-Leena Härkönen, and Laura Malmivaara.

[3][4] In 2007, Sooloilua (Playing Solo) was released as a film, directed by Lauri Nurkse, and starring Saija Lentonen, Kari-Pekka Toivonen, and Kristiina Elstelä, with Kallio again being the screenwriter.

[5] In 2010, If You Love (Jos rakastat) was released, based on an original idea by Jarkko Hentula, and with the screenplay written by Kallio.