In 1983, he formed his own theater group called "La Mueca", with which he has presented works such as "Sombras y sueños", "A guayaco in Hollywood", "El Andamio", "Furia de chiros", "Maestra vida", among others, establishing himself since the 90s in the theater "El Angel", located in the Urdesa citadel. During the 80s, after impersonating a public bus driver who said "I won it" for a National Lottery commercial, Tati Interlli decided to put on a play called "¡Me la gané por Diosito Santo!" about a womanizing man who has 4 children, who entrusts them to his wife.