Guilherme Arantes (Portuguese pronunciation: [ɡiˈʎɛʁmi aˈɾɐ̃tʃis]) is a Brazilian singer-songwriter and pianist. He is a Steinway Artist.
As a teenager, he was a member of the band Os Polissonantes, which also featured Brazilian actor Kadu Moliterno on bass guitar. In 1969, Arantes started the band