Rags to Riches (foaled February 27, 2004, in Kentucky) is a retired champion American Thoroughbred racehorse who won the 2007 Belmont Stakes, the first filly to win it in over a century.

Bred by Skara Glen Stables, Rags to Riches was purchased for US$1.9 million in September 2005 at the Keeneland Sales by the partnership of Michael Tabor & Derrick Smith.

Sent to the track at age two under trainer Todd Pletcher, Rags to Riches made her first start at Churchill Downs in a 5½-furlong maiden race on June 10, 2006, finishing fourth.

Brought back to competition on January 7, 2007, she won her first race at Santa Anita Park by six lengths.

A month later, ridden by Garrett Gomez, she won the 8-furlong Las Virgenes Stakes after running five wide for a good part of the race.

In the race, Rags to Riches stumbled out of the starting gate but recovered to move within striking distance of the pacesetters.

At the top of the stretch, she dueled head-to-head with Preakness Stakes and eventual Horse of the Year winner Curlin.

Curlin put his nose in front briefly, but the filly fought back and beat him to the finish line by a head.

Belmont Park track announcer Tom Durkin called the race: "Here comes Hard Spun.

Despite several minor medical problems over the summer, Rags to Riches continued to train at Belmont Park towards the 2007 Breeder's Cup.

She made her return to the races in the $250,000 Gazelle Stakes at Belmont Park on September 15 and finished second to Lear's Princess.

It was announced the next day, September 16, that X-rays had revealed a hairline fracture in her right front pastern, and that her trainer, Todd Pletcher, had taken her out of training.