The former Horse of the Year who won 19 of 20 races during her racing career, Zenyatta, gave birth Thursday night to a 130-pound colt.

Around 10:10 p.m. in Lexington, Ky., the 8-year-old prize horse birthed an unnamed boy with a white star on his forehead and with white on his feet. He also has polka dots on his feet, according to Zenyatta's website.

I am so proud and elated to share the news with you that I am now a MOM, Zenyatta wrote on her diary, on her website.  (But it was much more likely that her owners did the writing.) I'm doing great. MY BABY is doing great...

Zenyatta's owners, Ann and Jerry Moss were present for the birth.

Hearing news of the birth, Zenyatta's trainer, John Sheriffs, was thrilled about the good news.

I'm just happy it really went smoothly and quick and the baby looked healthy, he said according to the L.A. Times.

Zenyatta retired from horse racing November 2010. She lost to Blame in the Breeder's Cup Classic, the only loss in her pristine career. She was ridden by Hall of Fame jockey Mike Smith.