Antonia San Juan (Las Palmas de Gran Canaria, 1961) is a Spanish actress, director, and screenwriter. She is universally recognized for her intense portrayal of Agrado in Pedro Almodóvar's film, *All About My Mother* (1999). This role, which earned her international acclaim, established her as a distinctive face of Spanish cinema.

San Juan is known for her ability to embody complex, eccentric, and often over-the-top female characters, blending vulnerability with strength. Her acting is characterized by a strong stage presence, a peculiar voice, and an innate sense of drama and comedy. Although often associated with Almodóvar's cinema, she has participated in numerous other independent film projects and theatrical works, where she has continued to showcase her versatility and unmistakable style.