Katja Keller was born in Bruchsal, Baden-Württemberg, Germany. She is an actress, known for Everything Will Be Fine (1998), Rock It! (2010) and SOKO Kitzbühel (2001).
Katja Keller studied dance, singing and acting at the Stage School in Hamburg from 1992 to 1994.
In 1993 she was discovered by Udo Lindenberg , who produced her album Coming Out (as Katja O. Kay) together with Frank Ramond . Further publications with different projects followed. Musically she worked u. a. with Andreas Herbig , Roland Spremberg , Lukas Hilbert and Pascal Kravetz together. She also works as a text consultant and author for Udo Lindenberg.
From 1997 to 2002 she played the role of the cult character “Billi Vogt” in the ARD television series Marienhof .
In 2011 she became headcoach of the ZDF series “Herzflimmern”. Since 2013 she works as acting coach for the Bavaria-Fiction Sturm der Liebe , as well as author and songwriter. In 2016 she finished her active acting career.