Ireland celebrities
45

Kieran O'Reilly (performer)

actor  
45

Caoimhín Ó Raghallaigh

player  
44

Pearse O'Neill

footballer  
45

Aidan O'Kane

footballer  
44

Malachai O'Hara

politician  
45

Brian O'Driscoll

player  
45

Chris O'Dowd

actor  
40

Kieran O'Connor

player  
45

Jerry O'Connor

 
45

James O'Connor (footballer, born 1979)

footballer  
45

Cian O'Connor

equestrian  
45

Ben O'Connor (hurler)

coach  
45

Paul O'Connell

player  
45

George O'Callaghan

footballer  
45

Donncha O'Callaghan

player  
45

Cian O'Callaghan

politician  
45

Ronnie O'Brien

footballer  
44

Paddy O'Brien (Tipperary hurler)

 
45

Derek O'Brien (footballer, born 1979)

footballer  
45

Declan O'Brien (footballer)

footballer  
45

Andy O'Brien (footballer)

Footballer  
44

Fionán Murray

footballer  
44

Siobhán McSweeney

actress  
45

Tomás McGrane

 
45

Phélim Mac Cafferty

 
44

Micheál Lehane

journalist  
45

Aidan Kearney (rugby union)

Former  
44

Ciara Gaynor

 
44

Joe Fortune

manager  
44

Emma Dabiri

television