| Tranquil Star | |
|---|---|
 Tranquil Star & Scobie Breasley | |
| Sire | Gay Lothario (GB) |
| Grandsire | Gay Crusader |
| Dam | Lone Star |
| Damsire | Great Star (GB) |
| Sex | Mare |
| Foaled | 1937 |
| Country | Australia |
| Colour | Chestnut |
| Breeder | St Albans Stud |
| Owner | T. G. Jones and Arthur Cobden |
| Trainer | Ron Cameron |
| Record | 111 starts: 23-20-12 |
| Earnings | £26,690 |
| Major wins | |
| Edward Manifold Stakes (1940) St George Stakes (1941, 1944, 1945) VRC St Leger (1941) Chipping Norton Stakes (1941) LKS Mackinnon Stakes (1942, 1944, 1945) Alister Clark Stakes (1942) Caulfield Stakes (1942) Caulfield Cup (1942) W S Cox Plate (1942, 1944) Memsie Stakes (1945) William Reid Stakes (1946) | |
| Honours | |
| Australian Racing Hall of Fame VATC Tranquil Star Stakes | |
| Last updated on 12 June 2010 | |
Tranquil Star (foaled in 1937) was one of the hardiest and best performed Australian-bred Thoroughbred race-mares. She is the only mare to have won the double of the Caulfield Stakes, now known as the Yalumba Stakes, and the Cox Plate, which is the most prestigious weight-for-age (wfa) race in Australia. Tranquil Star had 111 starts and won over distances ranging from 5 furlongs (1,000 metres) to 14 furlongs (2,800 metres). She was later inducted into the Australian Racing Hall of Fame.