Michael Costello may refer to: Michael Costello (actor), American actor Michael Costello (public servant), ex-chief of staff to Australian politician Kim Beazley Michael A. Costello (born 1965), State Representative for the Massachusetts House of Representatives Michael Costello (fashion designer), American fashion designer and contestant on Project Runway (season 8) Michael Copps Costello (1875–1936), Canadian politician Mike Costello, British sports broadcaster Michael Joe Costello (1904–1986), Irish Army general Mick Costello (born 1936), British communist activist