Thiago Raphael Castanho (born February 8, 1975) is a Brazilian guitarist, record producer, painter and sculptor, best known for being a founding member of alternative rock bands Charlie Brown Jr., Aliados, A Banca and O Legado, and for his subsequent work with Ira!

Thiago Raphael Castanho was born in Santos, São Paulo on February 8, 1975, and would learn how to play the guitar with 13 years old, encouraged by a sister.

Around the same time Castanho was invited by Capital Inicial's vocalist Dinho Ouro Preto to be a guest musician on their Acústico NYC DVD, recorded at a performance in New York City.

[12] On July 21, 2013, while travelling to Manaus for a performance with A Banca, an elderly woman accused Castanho of sexual harassment inside the airplane.

[15][16] He parted ways alongside bandmate Marcão on October 25, citing creative divergences with Chorão's son Alexandre, the tour's organizer.