Dannielynn, 9, was the spitting image of her late mother in a light green dress and a matching pink floral headband and pink shoes, reported Us magazine.
Larry, 43, matched his charming daughter in a light green suit jacket, a white shirt, a pink bowtie and white pants.
The father-daughter duo live in rural Kentucky and have attended the annual horse racing event regularly for several years.
Larry has raised Dannielynn on his own since Smith's death in February 2007. The Playboy model died at the age of 39 as a result of a drug overdose.