Konstantin Alexander Wecker (born in Munich 01.06.47) is a German singer/songwriter with piano as his main instrument, widely known for his political engagement. He rose to fame in the seventies, with "Willy" (on the album "Genug ist nicht genug" ["enough is not enough"] in 1977) as his first big hit. He has released more than 40 albums, tours extensively, also with Hannes Wader, and also enjoys a carreer as actor (infamous for the sexfilms of the seventies), author (often self-biographical in character) and composer of film-music and musicals.