[1] Thomaz was born in São Paulo, the son of Luciana Santos and Roberto, and the older brother of Lívia Helena.

He was the winner of the "Cena em Ação" contest of the Hebe program at SBT, Thomaz won a role in the novel "Vende-se um Véu de Noiva".

The following year he appeared in the Brazilian production of the musical show "O Rei e Eu", a sophisticated production that obtained excellent reviews and nominations, which premiered on February 27, 2010 in São Paulo, at Teatro Alfa.

Months later, he announced that he would stop publishing his intimate content, as his new decision is to build a family.

[23] In March 2024, Thomaz Costa was involved in a major controversy after humiliating a former co-worker, reducing his participation in the soap opera Carrossel.