Luis Mario Cayetano Spota Saavedra Ruotti Castañares (13 July 1925, Mexico City — 20 January 1985) was a Mexican writer, journalist, boxing official and film director.

Although he never finished primary school, Spota became a highly successful author and journalist in his lifetime, appearing frequently on TV and radio.

He began as a staff reporter at the Mexico City newspaper Novedades de México , where he later became a columnist.

Several of his books are available in English: Other films based on his work include Roberto Gavaldón's acclaimed drama En La Palma de Tu Mano (In the Palm of Your Hand), which won all the top Ariel Awards of 1951; The Empty Star (La estrella vacía), directed by Emilio Gómez Muriel and starring María Félix in 1960; Ismael Rodríguez's The Paper Man (El hombre de papel, 1963) with a performance by Ignacio López Tarso that won him the Golden Gate Award for Best Actor at the San Francisco International Film Festival; and Arturo Ripstein's Cadena perpetua (1979).

Spota also directed several action films and the anthology film Amor en cuatro tiempos (Love in Four Times, 1955), starring Arturo de Córdova, Marga López, Jorge Mistral, Silvia Pinal and Ariadne Welter.