Secretariat's Pedigree
| Bold Ruler | Nasrullah | Nearco | Pharos |
| Nogara | |||
| Mumtaz Begum | Blenheim II | ||
| Mumtaz Mahal | |||
| Miss Disco | Discovery | Display | |
| Ariadne | |||
| Outdone | Pompey (B) | ||
| Sweep Out | |||
| Somethingroyal | Princequillo | Prince Rose | Rose Prince |
| Indolence | |||
| Cosquilla | Papyrus | ||
| Quick Thought | |||
| Imperatrice | Caruso | Polymelian | |
| Sweet Music | |||
| Cinquepace | Brown Bud | ||
| Assignation |
Click here to read our exclusive story about Secretariat's Half-Brother.