McKulick is out of Astrelle (Makfi), who won twice as a juvenile and was second in the Gr.3 Oh So Sharp Stakes, and is the third foal and third stakes winner out of the mare. Her two older stakes winners are Fearless King (Kingman), winner of the Gr.2 Mehl-Mülhens-Rennen in Germany, and Just Beautiful (Pride Of Dubai), winner of the Gr.3 Sceptre Stakes and the Listed Maggie Dickson Stakes and Group-placed in France.

The second dam Miss Mariduff (Hussonet) was unraced and has produced seven other winners, among them Porsenna (Dylan Thomas), a 19-time winner in Italy whose successes include the Gr.2 Premio Ribot, Basileus (Dream Ahead), a dual Listed winner in Italy and multiple Group-placed, Candidate (Camelot), Group 3-placed in Australia, and Libertine (Dark Angel), third in the Listed Prix La Camargo.

The third dam Sopran Mariduff (Persian Bold) won the Grade 2 Black Helen Handicap and two Listed races in Italy, and was third in the Italian Oaks, then a Gr.1. She is the dam of six winners in the US, including the Listed-placed Constant Touch (Belong To Me).

Astrelle has a 2-year-old colt, Lieber Power (Cracksman), and a yearling filly by Calyx.