Constantine Lekapenos or Lecapenus (Greek: Κωνσταντῖνος Λακαπηνός, translit. Kōnstantínos Lakapenós) was the third son of the Byzantine emperor Romanos I Lekapenos (r. 920–944), and co-emperor from 924 to 945. With his elder brother Stephen, he deposed Romanos I in December 944, but was overthrown and exiled by the legitimate emperor Constantine VII (r. 913–959) a few weeks later. Constantine was exiled to the island of Samothrace, where he was killed while attempting to escape sometime between 946 and 948.