Olavo Brás Martins dos Guimarães Bilac (16 December 1865 – 28 December 1918), known simply as Olavo Bilac (Portuguese pronunciation: [oˈlavu biˈlak(i)]), was a Brazilian Parnassian poet, journalist and translator.

Alongside Alberto de Oliveira and Raimundo Correia, he was a member of the "Parnassian Triad".

As a young man, he was a brilliant student, enrolling in the school of medicine at the Federal University of Rio de Janeiro at the age of 15.

In 1891, he was arrested at the Fortaleza da Laje in Rio de Janeiro for opposing the government of Floriano Peixoto.

He had an even shorter engagement to Maria Selika, daughter of violinist Francisco Pereira da Costa, but a legend says that Amélia was very faithful to Bilac: she never married, and, when Bilac died, she put a lock of her hair in his coffin.