Rory O'Donoghue (born 13 May 1949) is an Australian actor and musician, best known for playing the character "Thin Arthur" in the 1970's ABC Television sketch comedy series The Aunty Jack Show, and for playing the guitar solo on Kevin Johnson's biggest hit "Rock and Roll I Gave You the Best Years of My Life".The Aunty Jack Show featured O'Donoghue's long time creative partner Grahame Bond as the title character.
An early collaborative work produced by Bond and O'Donoghue was the University of Sydney student theatre revue "The Great Wall of Porridge" in 1967. It was a profitable success and was performed in a theatre off the University campus, with the funds reportedly paying for a parquetry floor in the Sydney University architecture students' common room.
Bond and O'Donoghue wrote the music for a pantomime "Hamlet on Ice", which premiered at the Nimrod Theatre. Its 1975 revival was described as "a jest at Shakespeare's Hamlet and Australian manhood among other things".
Bond and O'Donoghue won an Australian Film Institute award in 1981 for best movie score for the music for the film Fatty Finn. O'Donoghue has also written music for advertisements.