In 1939 he played Horatio to Laurence Olivier's Hamlet at the Old Vic - the production also included Alec Guinness and Michael Redgrave.
His acting break came when he played Horatio in Laurence Olivier's Hamlet (1948).
He was also an acclaimed stage actor, perhaps best-remembered for playing Horatio to Maximilian Schell's Hamlet in 1960's Munich August Festival and a subsequent television adaptation.
Karl Michael Vogler played Horatio.
He almost wished he were playing Horatio instead of Laertes.
I played Horatio, the juvenile leads, the first murderer in Macbeth, Edgar in 'King Lear.'
He is also co-director with Mr. Eisenbach, who is playing Horatio.
This was "Hamlet," starring Tim Martin in the title role, in a production produced by him and which he directed with Dave Eisenbach, who also played Horatio.
'I saw Michael playing Horatio in Hamlet and thought 'If he can do it, so can I.
On stage Whelan has played Horatio in Hamlet and Salisbury in Richard II.