Marcelo Tristão Athayde de Souza (born November 10, 1959), better known as Marcelo Tas, is a Brazilian director, writer, actor and television host. He was the main host of Torcedores.com for the coverage of the 2018 Soccer World Cup in Russia. Before that: children series "Ra-Tim-Bum" (TV Cultura - Brazil); "Ernesto Varela, the Reporter" (MTV Brasil, Gazeta, SBT, TV Record- Brazil); Telecurso (Globo TV/ Roberto Marinho Foundation); and the anchor for 7 years at the humor show CQC (Band). Tas is the creator and presenter of the YouTube channel DESCOMPLICADO, in a commercial and content partnership with the Udacity. Lecturer and professor at IBMEC São Paulo on the virtues, opportunities and side effects of the digital age.