Sibelius is out of the unraced Fiery Pulpit (Pulpit) and is the seventh of her eight winners from ten foals aged three and over. She is also the dam of two stakes-placed runners, Paddock Pick (Graydar) and Dypsy (Broken Vow), and Dypsy is the dam of the stakes winner Edwards Going Left, twice placed at Grade 1 level.

Second dam Pretty Flame (Mt Livermore) was a winner and produced eleven winners from 16 foals. They are headed by Clamorosa (Seattle Dancer), a Group 3 winner, and the stakes winner Bensonhurst Bull (Geiger Counter), and include stakes-placed winners by Deputy Minister, Sky Classic, Saint Ballado and Trempolino.

Third dam Pretty Driver (Lt Stevens) was placed and has ten winners from eleven foals, among them the stakes winners Pretty Sham (Sham) and Colonel Hill (Temperence Hill). She is also the grandam of the Group 3 winner Tolanda, dam of Tytola, a Group 1 winner in South Africa.

Fiery Pulpit has a 2-year-old colt by Palace Malice.