How fast can Jessica Ennis run?

Jessica Ennis-Hill, a retired British heptathlete and Olympic gold medalist, is known for her exceptional speed, particularly in the 800 meters and 100 meters hurdles events. Her personal best in the 100 meters hurdles is 12.54 seconds, and she has run the 800 meters in 1:59.32. While her times vary depending on the event, her overall performance showcases her speed and agility as one of the top multi-event athletes.