Alberto San Juan Guijarro (born 1 November 1967) is a Spanish film, stage and television actor.

Alberto San Juan was born on 1 November 1968 in Madrid, the son of cartoonist Máximo San Juan [es] and radio announcer Pilar Guijarro Ortiz de Zárate.

[3] He studied journalism and worked for two years at Diario 16 before pursuing an acting career.

[4] At age 24, he joined the Cristina Rota's atelier to train his acting chops.

[5] Jointly with Guillermo Toledo, Nathalie Poza and Ernesto Alterio, San Juan founded the theatre group 'Ración de oreja', which merged with Andrés Lima's 'Riesgo' into the theatre company Animalario [es].