The Kentucky Derby has been a playground for celebrities and rich people for over 100 years — here's how it has evolved over time

• The Kentucky Derby is having its 144th run this year on May 5th.
• Wild fashions and large hats have long been associated with the Kentucky Derby.
• Horse racing and mint juleps are also embedded in the culture of the event.

Since the races were first run in 1875, the Kentucky Derby has been drawing thousands of celebrities, politicians, and Louisville locals to the horse track at Churchill Downs.

Started by Louisville Jockey Club founder Meriwether Lewis Clark Jr., the sporting event has a long history tied to horse racing, mint juleps, and, of course, the famous Kentucky Derby hat.

As you prepare to watch the 144th iteration of the big event Saturday, see an overview of the Derby's history in photos. 

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Though the Kentucky Derby was held for the first time in 1875, photos of it began to appear in the 1920s. It was during this time that the derby began being broadcast on the radio, and five to six million listeners tuned in.

Starting in 1931, the Kentucky Derby was permanently scheduled for the first Sunday of every May.

Even throughout the years of the Great Depression, the race continued, though tickets were priced at 50 cents for a spot in the infield. In 1932, it was broadcast on the radio internationally.