Circus Ring later became a successful broodmare and was the direct female-line ancestor of the Hong Kong Horse of the Year Viva Pataca.
Circus Ring was a dark-coated bay filly with no white markings, bred and owned by the Snailwell Stud of Newmarket, Suffolk.
Circus Ring's dam Bell Song was a great-granddaughter of the 1000 Guineas winner Campanula, whose other descendants have included Athens Wood, Tony Bin, Dibidale (Irish Oaks), Vitiges (Champion Stakes) and Bolkonski.
She produced what Timeform described as "one of the most breathtaking displays by a two-year-old filly that we have seen in a long time",[3] taking the lead approaching the final furlong and sprinting clear of the field to win by ten lengths.
Circus Ring was being prepared for a run in the Group One Cheveley Park Stakes when she fell lame in mid-September and was retired for the season.