from http://www.dailymail.co.uk/femail/article-1332623/David-McCallum-My-father-felt-I-wasting-life.html
The Daily Mail Online
 David 
  McCallum: My father sometimes felt I was wasting my life
David 
  McCallum: My father sometimes felt I was wasting my life
  By Yvonne Swann
  Last updated at 10:30 PM on 26th November 2010 
Actor David McCallum, 77, is most famous for his roles in the classic TV series 
  The Man From U.N.C.L.E. Now starring in NCIS, he lives in New York with his 
  second wife, Katherine, with whom he has a son and a daughter. He also has two 
  sons from his first marriage.
  Musical: David McCallum, aged 12, at University College School in Hampstead, 
  north-west London 
  David says: This is a photograph of me aged about 12 at University College School 
  in Hampstead, north-west London. 
I was born in 1933 in Glasgow. My parents were both musicians. My mother, Dorothy, was a cellist and my father, David, was first violinist. With my older brother, Iain, we moved to Hampstead in 1936, when Father became leader of the London Philharmonic.
My first school there was a tiny kindergarten. All I remember is that our teacher 
  wore mauve silk stockings and, aged three or four, I always tried to sit up 
  close to her so I could feel those silk-clad legs.
  At the end of 1939 or the beginning of 1940, I was evacuated to Scotland, and 
  my mother came too. At first, we stayed with her sister, Margaret, then took 
  a house in Gartocharn by Loch Lomond. I don’t remember much about my time 
  at school there, but I always enjoyed it. I had worked out exactly how much, 
  or perhaps how little, to do in order to get by. My reports always said, ‘Does 
  well, but could do better.’
  Anyway, we came back to London and I won a scholarship, aged ten, to University 
  College School. It was an amazing place. 
The headmaster used to walk around with a Sudanese spear, and as it was a Classics 
  school, everything was in Latin. Learning Latin and Greek for eight years was 
  wonderful, but it meant we studied history and geography less than is usual.
  At home, music was omnipresent, and my parents both assumed at first that I 
  would follow them into the family business. As a child I would go with my father 
  down to the studios where Jascha Heifetz, the famous violinist, was recording 
  Brahms. I remember Heifetz’s G string broke at one point, and he handed 
  it to me.
  My father polled friends about which instrument I should study, with a view 
  to future employment opportunities, and settled on the oboe. There was I, still 
  a young boy, and he was choosing my profession; but I was happy to comply. I 
  was in the school orchestra and gave the odd recital. But I was also involved 
  in amateur dramatics.
  Driven: David did what was necessary in school and sought acting work at the 
  earliest opportunity
  I still play the oboe, but music never grabbed me the way that acting did. One 
  time I played the part of the doomed prince in the dungeon in Shakespeare’s 
  King John. I pleaded, unsuccessfully, with the assassin not to kill me. It is 
  a real tear-jerker, and the audience applauded wildly at the end.
  It was in that moment I realised that my home in this world was on a stage. 
  Best of all, my efforts as an actor didn’t involve homework or the sort 
  of practice that music requires. I did what was necessary in school and sought 
  acting work at the earliest opportunity.
  From then on I worked behind the scenes as well as on stage, both at school 
  and with amateur dramatics groups. And in one summer holiday I apprenticed myself 
  to Mr Wiggly, the local electrician, so I could make myself even more useful 
  in the theatre.
  I started working for the BBC in 1946 when I was 12, playing boy voices for 
  the BBC radio repertory company. What fun, and I got my Equity card too. 
My father was working for the BBC at the time and introduced me to actor Laidman Browne, who was then in charge of that whole group of actors and actresses, including stars like Gladys Cooper. It was an extraordinary experience. Nobody really knew about it at school. I was a well-behaved boy, but I did get in trouble in one school Shakespeare production.
I played Trinculo, the jester in The Tempest, and after seeing me perform, 
  the headmaster called me into his office and said there was too much clowning 
  going on. I had read that Shakespeare had been somewhat bawdy, and I thought 
  my antics were perfect. So I did it the same way at every performance; I wasn’t 
  going to take any notice of the headmaster because, as far as I was concerned, 
  he didn’t know what he was talking about.
  A couple of years later, after this same headmaster had lectured the Upper Sixth 
  on the perils of homosexuality, he hanged himself that same night. 
No one had any idea why! I did my final exams at 18, and after my military 
  service with the Royal West African Frontier Force, I went to RADA. It was interesting, 
  and I was there with Joan Collins, but it seemed a little silly in some ways 
  compared to just doing the job. I started in repertory theatre as soon as I 
  left.
  My father sometimes felt, as I was going along, that I was wasting my life. 
He thought I was working incredibly hard and making no money at all. But my 
  parents’ philosophy was simple.
  They gave my brother and me a secure environment that allowed us to go out and 
  achieve our maximum potential. They never interfered, only encouraged. We both 
  made our own decisions and lived by the consequences. 
I knew my father felt that music would give me a better standard of living than the vicissitudes of the theatre, but he didn’t say it openly.
Then I did a film called Robbery Under Arms and my name was up in huge letters 
  on the Odeon Leicester Square. He and I walked by, and he said, ‘I think 
  you have made the right choice after all.’
  It was a lovely moment.
  NCIS is on CBS Action (Sky 148/ Freesat 137), weekdays at 9pm.