The American Warmblood, sometimes known as the American Sport Horse, is a modern sport horse type developed in the United States. Unlike traditional breeds, it is registered within open studbooks, focusing on athleticism and temperament over strict pedigree. Originating from blends of European Warmbloods, Thoroughbreds, and occasionally Arabians or Irish Draughts, it prioritises performance for disciplines such as dressage, show jumping, and eventing. Physically, these horses stand around 15.3 to 17 hands tall with an athletic build, powerful hindquarters, and expressive, elastic movement suited for Olympic-level sports. Their temperament is widely praised for being trainable, intelligent, and calm, making them ideal for both amateur riders and professional competitors. The American Warmblood's versatility and robust health make it a popular choice across the UK for riders seeking a reliable and adaptable sport horse. Registries like the American Warmblood Registry (AWR) and Sporthorse Registry of North America (SRN) maintain strict inspection criteria, ensuring quality conformation and sound movement. Overall, the American Warmblood offers a flexible and performance-focused option, combining the best traits from diverse bloodlines for various equestrian pursuits in the UK market.