Starting them out young, Mexico's 18th annual clown convention gets underway with its signature colorful parade.
The "Festival of Laughter" as it's also known, is convened by the Brotherhood of Latin Clowns.
About 500 clowns from 12 countries have come to the city to hone their clowning skills.
Clowns are a familiar part of Mexican culture and life. Thousands of comics perform tricks at traffic intersections to earn a few pesos.
It's a tough life and the convention is part of an effort to maintain high standards so that clowns don't lose income.