She was born in Baden-Baden to Peter Kamp and his wife. She visited drama schools in New York, Los Angeles and Paris before she started her career as an actress in 1994. She has had many star and supporting roles in German movies and TV series and some in Hollywood B-movies. In 1998, she acted together with Claudia Cardinale in Riches, Belles et Cruelles, in 2001 with Leslie Nielsen in 2001: A Space Travesty and in 2003 she played the star role in Sumuru together with Michael Shanks in an English-South African co-production. In 2007 she appeared as a covergirl on the German issue of the Playboy. Alexandra is the spokeswoman for the children's hospital "kinderhospiz" in the Bavarian Alps, which gives a care home to terminally ill children and their parents. She frequently gives charity readings.