Alfonso Cuarón was rumored to be circling the project just weeks before Joe Wright signed on to direct.

Gael García Bernal and Diego Luna each shot a scene.

The last names of all the principal characters (Zapata, Iturbide, Carranza, Cortés, etc.) are those of important figures in Mexican history.

Both boys’ sex scenes with Luisa last exactly the same amount of time: 1 minute, 28 seconds.

In an interview, Gael García Bernal revealed that some drops of a famous brand of shampoo were used as semen in the scene where Julio and Tenoch masturbate in the pool. 

Diego Luna wore a prosthetic penis to appear circumcised.

The phrase “Y tu mama tambien”, by itself, is not offensive, but if you put an offense before it or you answer to an offense with it, it is one of the most offensive phrases in Mexican Spanish. By itself, it means “And your mother too.”

The translation of the tagline is: “Life has its way of teaching us. Life has its way of confusing us. Life has its way of changing us. Life has its way of astonishing us. Life has its way of hurting us. Life has its way of curing us. Life has its way of inspiring us.”

Broke Mexican Box office records on June 8th, 2001, grossing $2.2 million in its first week, the biggest opening ever for a Mexican film.