Regulus proved to be an excellent sire. At stud, he sired Royal (1749), South (1750), Fearnought (1755), undefeated
Alipes, Star, Cato, Juba, Ascha, Grisewood's Lady Thigh, Miss Belsea, and many successful broodmares including
Spilletta who is the dam of the undefeated champion
Eclipse. Regulus also sired the second dam of
Highflyer. His offspring's successes led him to be the
Leading sire in Great Britain & Ireland for eight years (1754–1757, 1761, 1763, 1765, and 1766). He died at age 26. == Sire line tree ==