Born and raised in Dublin, the veteran actor went to the Christian Brothers school in Synge Street.
O’Shea lived in New York, where he moved in 1976.
Described by Minister for Arts Jimmy Deenihan as “a giant of stage and screen” .
“During his career in theatre and film, both at home and abroad, he is remembered for the quality of his performances in a range of challenging and often ground-breaking roles”
- Leopold Bloom in the 1967 film adaptation of James Joyce's Ulysses in 1967
- Neil Jordan’s 1997 film The Butcher Boy
- 1968 Romeo and Juliet
- American sitcom Cheers
- 1960s BBC sitcom Me Mammy
- US comedy Frasier
- US political drama the West Wing
- Roger Vadim's movie Barbarella as a mad scientist
- Most recently in Irish comedy The Matchmaker
He is survived by his wife the actress Kitty Sullivan, his sons - Colm, Steven and his three grandchildren. He was previously married to Glenroe actor Maureen Toal who died last year but couple divorced in 1974.