Kelly Dean Keagy is an American drummer and vocalist, best known for his work with the hard rock band Night Ranger. Keagy sang lead vocals on several of their hits, such as "Sister Christian", "Sing Me Away", and "Sentimental Street".

Night Ranger is an American hard rock band from San Francisco, California. The band, which had its inception in 1979, experienced a surge of popularity during the 1980s with the release of several successful albums and hit singles. Guitarist Brad Gillis and drummer Kelly Keagy have been the band's only constant members, though bassist Jack Blades performed on all but one of their albums. Other current members of the band include guitarist Keri Kelli and keyboardist Eric Levy.