Marieta Severo da Costa (born 2 November 1946) is a Brazilian stage, film and television actress.

She studied in Tablado Theater in 1965, and later that year, premiered on her first play Feitiço de Salém.

In 1995, critical acclaim came with the film Carlota Joaquina - Princesa do Brasil, which she also starred with Nanini.

She continues to appear with major supporting characters in films like Cazuza - O Tempo Não Pára and TV shows, but she is perhaps widely known and acclaimed for her role as Nenê, the matriarch of the Silva family in the Rede Globo series A Grande Família (in which she also stars with Nanini).

Severo was married from 1966 to 1999 to popular MPB singer Chico Buarque de Holanda.