Kettledrum (1858–1885) was a British Thoroughbred racehorse and sire. In a career that lasted from August 1860 to September 1861 he ran eight times and won four races. As a three-year-old in 1861, he won The Derby and the Doncaster Cup and finished second in the 2000 Guineas and the St Leger. At the end of the season he was retired to stud where he had limited success, and was later exported to Austria-Hungary.

The Doncaster Cup is a Group 2 flat horse race in Great Britain open to horses aged three years or older. It is run at Doncaster over a distance of 2 miles 1 furlong and 197 yards, and it is scheduled to take place each year in September.