The Celestial Monarch (Hypothymis coelestis) is a species of bird in the Monarchidae family, and one of the most attractive of all the monarch flycatchers, with its spectacular blue crest and large yellow eye-ring. It is endemic to the Philippines.

Its natural habitat is subtropical or tropical moist lowland forests. This beautiful insectivore is declining rapidly, with recent surveys revealing its presence at only 10 sites. Widespread and continuing reduction of its lowland habitat leaves its population severely fragmented and its status is vulnerable according to the Red Data Book of Threatened Birds of Asia.