Xenia Seeberg (born on 4 April 1972 in Geldern, Germany) is a German film and television actress. She is perhaps best known for her role as Xev Bellringer in the science fiction television series Lexx. She also debuted as a singer in 1996 on the EMI Electrola label with her maxi single "Heartbeat". Several of her songs including "Heartbeat" have appeared on several compilations such as Dance Fever (1996), Dancemania 4 (1997) and Absolute Music 20 (1999).
In 2003 she married actor Sven Martinek. They have one son Philip-Elias (born 2005). She is the lead singer of the band Vertikals.
In April 2005, Seeberg appeared on the cover of the German edition of Playboy.
She was ranked #84 on the Maxim Hot 100 Women of 2001.