Ovidio Cátulo González Castillo (6 August 1906 – 19 October 1975) was an Argentine poet and tango music composer.

The tango La calesita, which he composed with Mariano Mores, inspired the film of the same name directed in 1962 by Hugo del Carril.

[3][4] He was also a boxer, eventually becoming the featherweight champion in Argentina and was pre-selected for the Paris Olympics, attending as part of his country's delegation,[3] but not competing.

[6] During the 1940s and 1950s, when tango was at its peak, he dedicated himself to poetry and wrote with distinguished composers: Mores (Patio de la Morocha), Pontier [es] (Anoche), Pugliese (Una vez), Sebastián Piana (Tinta roja and Caserón de tejas), and his main collaborator after 1945: Aníbal Troilo (María, La última curda, Una canción).

His wife, Amanda Pelufo, recalls those times:[8] "Lo teníamos todo y de pronto, en 1955, nos quedamos sin nada.

Cayó Perón, llegó la Libertadora y a Cátulo lo echaron de todas partes.

Ni siquiera pudo cobrar sus derechos de autor porque SADAIC, precisamente, fue intervenida.

En el peor momento hasta llegaron a prohibir que se pasaran sus temas por radio.

Cátulo escribía tangos, pintaba al estilo de Quinquela y sobre todo descubrió su amor por los animales.

Included on blacklists with dozens of other tangueros like Hugo de Carril, Nelly Omar, Héctor Mauré [es], Anita Palmero, and Chola Luna, among others, he was persecuted for his political ideas, and did not return to work until the regime's fall.

Among his most popular songs were: Maria, El último café, La última curda, La Calesita, Café de los Angelitos, Desencuentro, Y a mi qué, A Homero, Arrabalera, Mensaje, Tinta roja, Patio mío, and Caserón de tejas.