Guilherme de Cássio Alves (born 8 May 1974), known simply as Guilherme, is a Brazilian retired footballer who played as a striker, and the current coach.
In his country, he played with eight clubs with different fortunes, and also competed professionally in Spain and Saudi Arabia during a 13-year career.
Over the course of 11 Série A seasons, he amassed totals of 155 games and 68 goals.
Guilherme appeared with the Brazilian national team at the 2001 Copa América.