Hartnell (foaled 19 April 2011) is a retired British bred thoroughbred racehorse that won four Group 1 races in Australia.

[2] Foaled at Rutland Stud, on the outskirts of Newmarket, Hartnell began his racing career with Mark Johnston.

He will join Godolphin's Lifetime Care program to be retrained, most likely as a show horse.

[4] Hartnell made his equestrian debut in 2021 and was successful in the Rising Star Thoroughbred Class event.

His new owner Sheralee Patterson was surprised by his victory stating, “It was his first day out pretty much.