The kinglet manakin or eastern striped manakin (Machaeropterus regulus) is a small South American species of passerine bird in the manakin family Pipridae. It is found in the Atlantic Forest of south eastern Brazil. It was formerly considered conspecific with the striolated manakin (Machaeropterus striolatus) with the common name "striped manakin". Males have a bright red crown, which the females lack. Like many other manakins, the males cluster in a leks to attract females. After mating, the females rear the chicks on without the help of the males.