Kentucky Derby: Hollywood Attends, Reacts

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Chris Rock, Sarah Hyland and Josh Groban were among the Kentucky Derby's attendees.

On Saturday, crowds of people gathered in Louisville, Ky., to watch the 2015 Kentucky Derby and attend festivities surrounding the annual event.

Sporting intricate and elaborate hats, derbygoers cheered on jockeys and their horses as they competed in the 141st annual derby at Churchill Downs.

See what a handful of Hollywood figures had to say about the annual affair.