Guillermo Francella (who is a very well known comedic actor in Argentina) had to shave a mustache he had been carrying for more than 20 years as a request from director Juan José Campanella.
In 2010 it became the second Argentine film to win an Academy Award for Best Foreign Language Film. The previous one was The Official Story (1985).
Pablo Rago, who plays Ricardo Morales, is the only Argentinian actor who work in the two Argentinian Oscar winner movies: La Historia Oficial (1985) y El Secreto de sus ojos (2009)
Director Juan José Campanella was not happy with the english translation of the title. The original title was intentionally ambiguous, since the spanish word "sus" could mean "their", but also "his" or "her".
When Pablo Sandoval explains the "passions" of the main characters, in the pub scene, he compares Irene with Susanita in her bride-to-be mania. Susanita is a character in the famous Argentinian comic-strip Mafalda, by Quino. Susanita is a blonde elementary school girl who is known for always talking about her future handsome husband and her future beautiful wedding, when she is not gossiping about the neighbor's marriages.
This is the second movie directed by Juan José Campanella to receive an Oscar nomination. The first one was Son of the Bride (2001).
The first digitally captured movie to win the Oscar for best foreign-language film.
Ricardo Darín and Soledad Villamil also starred together in El mismo amor, la misma lluvia (1999)
Official submission of Argentina for the 'Best Foreign Language Film' category of the 82nd Academy Awards in 2010.