In one example in accordance with the present disclosure a flexible printhead is described. The printhead includes a number of printhead die, a printhead die including a number of nozzles to deposit an amount of fluid onto a print medium. The printhead also includes a fluid delivery system to deliver the amount of fluid from a fluid supply to the number of nozzles. The printhead also includes a number of electrical circuits to electronically couple the number of printhead die with a printing device. The printhead also includes a flexible substrate on which the number of printhead die and the number of electrical circuits are mounted.