Kate del Castillo (born October 23, 1972) is a Mexican actress.

Del Castillo is the daughter of Kate Trillo and Eric del Castillo, a legend of the Mexican cinema's golden era and a former soap opera actor himself. Del Castillo also has two other siblings; a sister Verónica, and a half-brother Ponciano, from her father's side.

She made her acting debut in 1980 when she took part in a film called The Last Escape. She became well known in 1991 when she starred as Leticia in Muchachitas, a telenovela that was very popular all over Latin America. Muchachitas reached the top audience spots in Mexico, Puerto Rico, Venezuela, Peru, and among Hispanic audiences in the United States. She also participated in other very successful telenovelas as a leading actress.

In 2002 and 2003, she embarked on an international tour alongside Argentinian actor Saul Lisazo, another well-known figure in Mexico, with their play Cartas de Amor (Love Letters).