Circle Of Fire is the fourth foal and third winner out of Fiery Sunset (Galileo), who won a maiden over 1m4f at Lingfield. He is a half-brother to Evening Sun (Muhaarar), a graded winner in the US in the Grade 3 San Francisco Mile. Fiery Sunset is a half-sister to Upcountry (Oasis Dream), a Listed winner in Macau.

Second dam Five Fields (Chester House) was a winner and is a half-sister to Senure (Nureyev), a dual Grade 1 winner in the US, and to Speak In Passing (Danzig), a Grade 3 winner in the US.

Third dam Diese (Diesis) won the Prix Corrida in France, then a Group 3, and bred three stakes winners, the best of them Senure. She is a half-sister to the Group 1 winner Xaar (Zafonic).

Fiery Sunset has younger foals by Fastnet Rock, Time Test and Land Force.