Frank Wöllschlager (born 11 March 1962), known professionally as Lenny Wolf, is a semi-retired German singer and musician, best known as the former lead singer of the hard rock band Kingdom Come. In addition to songwriting and lead vocals, he played multiple instruments on various Kingdom Come albums. He also collaborated on the song "Eyes of Time", from The Final Experiment, the debut album by Arjen Anthony Lucassen's project Ayreon. He was also a member of the bands Germany in 1982 featuring Dieter Buttner, Andreas Daniels, Miroslav Supica, and the band Stone Fury between 1984 and 1986 featuring Bruce Gowdy, Rick Wilson Jody Cortez and Vinnie Colaiuta.