João Guilherme de Ávila Costa (born February 1, 2002) is a Brazilian actor and singer. He gained national fame for his role as Joaquim, one of the main characters in the remake of the children's soap opera "Heirs of Inheritance".

He began his acting career in 2009 at the age of 7, playing Vinícius in the short film "Ventu" alongside Vivianne Pasmanter. In 2012, he appeared in the film "My Orange Tree", playing Zezé. The adaptation of the classic of the same name by José Mauro de Vasconcelos. João Guilherme began his music career playing Joaquim in "Heirs of Inheritance".