After proving herself the best Irish filly of her generation in a brief two-year-old career, she won the British Classic 1,000 Guineas Stakes on her three-year-old debut.
She was sired by High Hat, who won several races (including an upset victory over Petite Etoile) for his owner Sir Winston Churchill.
[1] As a yearling, Glad Rags was sent to the Newmarket sales where she was bought for 6,800 guineas[2] by American Alice du Pont Mills, a member of the prominent Du Pont family who was an advisory trustee to the National Museum of Racing and Hall of Fame at Saratoga Springs, New York, and a director of the American Grayson-Jockey Club Research Foundation.
[5] In a close finish, she won by a neck from Berkeley Springs, with the favourite Miliza in third ahead of Soft Angels, who had behaved in a "regrettably wayward"[2] manner before the start.
In the Irish 1,000 Guineas she started odds-on favourite but finished unplaced behind her stable companion Valoris who went on to win The Oaks.