impersonate
     v 1: assume or act the character of; "She impersonates Madonna";
          "The actor portrays an elderly, lonely man" [syn: {portray}]
     2: represent another person with comic intentions
     3: pretend to be someone you are not; sometimes with fraudulent
        intentions; "She posed as the Czar's daughter" [syn: {pose},
         {personate}]
Source: WordNet® 2.0