Hundreds of clowns are in Mexico City for the week-long International Clown Convention.
Jesters from all over the Americas are gathering to show off their talents, swap ideas and learn new tricks.
Seminars and conferences will also be held for participants to stock up on the latest costumes and make up.
This year, attendees will try to break the world laughing record. It currently stands at ten minutes.
Clowns are very much part of Mexican life.
The Latin-American Clown Association estimates the country has some 10,000 professionals making people laugh for a living.