Peter Donald (June 6, 1918 – April 20, 1979) was a British-born actor who worked in American radio and television.

[2] He portrayed Ajax Cassidy on Fred Allen's radio show, the Irishman who continually complained that he was "not long for this world."

In addition to his long run on "Allen's Alley," Donald was a regular on Radio Reader's Digest, Stage Door Canteen, and We, the People.

[7] Donald was the host of two early television series, The Ad-Libbers (1951) and Masquerade Party (1954–1956), and he made numerous TV guest appearances as a comedian (The Colgate Comedy Hour, The NBC Comedy Hour) and panelist (Pantomime Quiz, What's My Line?, To Tell the Truth).

In addition to Donald's delightful stories, the show's highlight is Sid Caesar's tour de force performance of his WWII bombing parody skit from the 1946 film Tars and Spars.