Dick Van Dyke, 100, works out UPSIDE DOWN in new video as he urges fans to 'keep moving'

Dick Van Dyke, 100, uses walker during rare outing with wife Arlene, 54

Dick Van Dyke, 100, leans on a walker as he enjoys rare public outing with wife Arlene, 54, in LA

Comedy icon Mel Brooks grins from ear-to-ear as he turns 100 and joins Dick Van Dyke as Hollywood centenarian