Kansas is an American progressive rock band from Topeka, Kansas. Formed in early 1973, the group originally featured lead vocalist and keyboardist Steve Walsh, violinist and co-lead vocalist Robby Steinhardt, lead guitarist and keyboardist Kerry Livgren, rhythm guitarist Rich Williams, bassist Dave Hope and drummer Phil Ehart. The band's current lineup features constant members Williams and Ehart, alongside bassist and vocalist Billy Greer (since 1985, co-lead vocalist since 2006), violinist and guitarist David Ragsdale (from 1991 to 1997, and since 2006), vocalist and keyboardist Ronnie Platt (since 2014), and keyboardist Tom Brislin (since 2018).