The march of the clowns in Mexico - video
It's a tradition that has been going on for over 30 years in Mexico City.
Local clown Garbancito told Reuters that the march is "to give thanks to the Virgin of Guadalupe for everything, for all the work given to us daily as well as the gift of being a clown".
The clowns finish their march at the Basilica of Our Lady Guadalupe, where they pray to the Virgin of Guadalupe.
They give thanks to the Virgin and ask her to watch over their friends and families.
It's not all serious though, as thousands of people join the clowns on the street to sing, dance and have fun.