Inés Efron (born June 21, 1985 ) is an Argentine actress best known for her appearance in the critically acclaimed 2007 film XXY, written and directed by Lucía Puenzo.
In her XXY role, Efron's character is a 15-year-old intersex person trying to make a decision about her or his identity. Efron pointed out that "I liked the Alex character a lot and thought: I can do that. I felt a real connection." For her performance, Efron won the award for Best Actress at the Cartagena Film Festival as well as three other awards.
Efron is cited by Internet portal Ciudad.com.ar as "one of the most interesting arising actresses of Buenos Aires."
Before XXY, Inés Efron starred in Glue, a drama about three teenagers set in a small town in Patagonia.
In 2009 Inés Efron starred in another of Lucía Puenzo's film called The Fish Child.