| Horsename: | Sickle |
| Sire: | Phalaris |
| Grandsire: | Polymelus |
| Dam: | Selene |
| Damsire: | Chaucer |
| Sex: | Stallion |
| Foaled: | 8 February 1924 |
| Country: | England |
| Colour: | Brown |
| Breeder: | Edward Stanley, 17th Earl of Derby |
| Owner: | 1) 17th Earl of Derby 2) Joseph E. Widener (at stud) |
| Trainer: | George Lambton |
| Record: | 10: 3–4–2 |
| Earnings: | US$24,122 |
| Race: | Mersey Stakes (1926) Goodwood Prince of Wales's Stakes (1926) Boscawen Post Stakes (1926) |
| Awards: | Leading sire in North America (1936, 1938) |
Sickle (8 February 1924 – 26 December 1943) was a British-bred thoroughbred racehorse who was later exported to the US where he was twice the leading sire in North America. He was bred by Edward Stanley, 17th Earl of Derby.
Sickle was a full brother to Pharamond, who also was a successful sire in the US[1] Their sire Phalaris, was twice the leading sire in Great Britain and Ireland and a three-time leading broodmare sire in Great Britain & Ireland. His dam Selene produced 16 named foals including the leading Argentine and Brazilian sire Hunter's Moon, and Hyperion, the 1933 Epsom Derby and St Leger Stakes winner and a six-time leading sire in Great Britain and Ireland as well as a four-time leading broodmare sire in Great Britain and Ireland. Pharamond and Sickle were inbred to Cyllene in the third and fourth generation (3Sx4D) and St. Simon in the third and fourth generation (4Sx3D).
Sickle was raced by Lord Derby and trained by George Lambton. The colt met with some success in racing, winning three of his ten starts and notably finishing third in a field of 23 in the 2,000 Guineas Stakes in 1927.
Retired to Lord Derby's stud for the 1929 breeding season, in a three-year lease agreement with American Joseph E. Widener that included a US$100,000 option to purchase, Sickle was sent to the US in time for the 1930 breeding season at Widener's Elmendorf Farm. In England, Sickle's first crop produced three stakes winners and in 1932 Widener exercised his option and purchased the horse. His first offspring in the US also met with racing success and Sickle went on to become a two-time leading sire in the US during his stud career, in 1936 and again in 1938. He was the sire of 297 foals, including 45 stakes winners.His progeny includes:
| 1931 | Hindu Queen | Mare | Multiple stakes winner | |
| 1931 | Jabot | Mare | Multiple stakes winner | |
| 1933 | Brevity | Stallion | Multiple stakes winner | |
| 1934 | Reaping Reward | Stallion | Multiple stakes winner | |
| 1935 | Cravat | Stallion | ||
| 1935 | Sickle T | Gelding | Multiple stakes winner | |
| 1935 | Silver Spear | Stallion | Durban July Handicap (1937) | |
| 1935 | Stagehand | Stallion | American Champion Three-Year-Old Male Horse (1938) | |
| 1938 | Minty Isle | Mare | Multiple stakes winner | |
| 1941 | Director J E | Stallion | Multiple stakes winner | |
| 1942 | Chief Barker | Stallion | Multiple stakes winner | |
| 1942 | Concordian | Stallion | Multiple stakes winner | |
| 1942 | Price Level | Mare | Multiple stakes winner | |
| 1943 | Star Pilot | Stallion | American Champion Two-Year-Old Colt (1945) | |
| 1944 | Brownian | Mare | Multiple stakes winner |
Sickle was the damsire of Kersala, the 1958 Kentucky Broodmare of the Year, as well as the damsire of these four Champions:
| 1944 | But Why Not | Mare | American Champion Three-Year-Old Filly (1947), American Champion Older Female Horse (1947) | |
| 1946 | Oedipus | Stallion | American Champion Steeplechase Horse (1950, 1951, 1952) | |
| 1948 | Counterpoint | Stallion | Belmont Stakes (1951), American Horse of the Year (1951), American Champion Three-Year-Old Male Horse (1951) | |
| 1953 | Bornastar | Mare | American Champion Older Female Horse (1958) |
At age nineteen, Sickle died unexpectedly on 26 December 1943 and was buried in the Elmendorf equine cemetery on acreage that was later subdivided and is now known as Normandy Farm.[6]