Archie Hahn (sometimes credited as Archie Hahn III) is an American character actor and improviser best known for his appearances on the British version of Whose Line is it Anyway?. He is also well known for appearing in This Is Spinal Tap, Phantom of the Paradise, and many Joe Dante films. Two of his appearances on Whose Line is it Anyway? live on in particular infamy, as Archie brought in castanets (during one of his last episodes) and false teeth (in the second).
Hahn was also well-known by being in the improv theater company, WAR BABIES.