Do you feel as if you were born to act? If acting feels like your destiny, that says a great deal about your conviction, which is something all actors need in a profession that can be tough going, even for those who've 'made it'. Acting training, let alone all those auditions and casting calls, can be draining, even demoralising, and you need resolve to persevere.

But are actors born to act? If you read or watch interviews with leading members of our profession, you'll have heard some say that from early childhood they had a need to show off and be the centre of attention. Does that mean you need to be some kind of exhibitionist to succeed in the acting world? Is acting ability dependent on personality attributes or innate ability?

Think of the acting greats of our times and it immediately becomes apparent that, personality-wise, the luminaries of stage and screen are a diverse bunch with equally diverse motivations and backgrounds. It's hard to find any obvious common denominator, except dedication to their art.

Some natural ability to perform (perhaps a gift for mimicry and voices) has no doubt led many actors to enrol in drama school. How 'natural' these abilities really are is debatable. They may be picked up from others and actively cultivated because they bring a child attention and approval. Also, an extroverted personality isn't necessarily the mark of a good actor. The flamboyant, gregarious 'luvvie' is one of those enduring clichés. In reality an introverted personality isn't a barrier to acting achievement and you don't have to be a party animal. Robert de Niro allegedly began acting to overcome shyness.

Raw talent surely exists, to some degree. But raw talent doesn't cook on its own (and even today's PR machines can only take people so far). Actors must learn their craft, from diverse teachers: in acting classes and from directors, fellow actors and the responses of the all-important audience.

It would be foolish to think that anyone can reach the pinnacle of the acting profession with raw talent alone, purely through will power or without additional training. Genius is famously 1% inspiration and 99% perspiration. Acting ability may similarly rest on the foundation of some mysterious and indefinable quality, but the rest is learned through hard slog - and good teaching.

For that reason, attending professional acting courses is the route taken by the vast majority of successful professional actors today. Lack of professional acting training is a prime cause of career crash. Complacency about one's supposed innate ability is also a sure-fire career killer. Acting classes are only partly about 'how to' lessons from a drama coach. Interactions with fellow students, and their feedback, can teach you vital lessons about your strengths and weaknesses as an actor. (See my article on 'Common mistakes' for more tips on what not to do. . . ).

If there is a personal attribute that the best actors share, it is surely their insight into human behaviour (including awareness of self) and the ability to translate that into their performances (if not necessarily their personal lives!). The introvert, with a rich inner world, may have some advantage here. This 'people-consciousness' and inner reach may be partly innate, or subliminal, as well as a product of our upbringing and personality. But, as with so many skills, it can be honed. Method acting, for example, provides actors with techniques for accessing inner realms, evoking sensory experiences and expressing emotion authentically and powerfully.

When the news of actor Natasha Richardson's tragically premature death broke, a New York newspaper ran a story with the headline 'A woman who was born to act'. How so? The answer is surely this: whatever innate ability Natasha Richardson possessed, it was nurtured in an environment which gave her detailed knowledge and a deep understanding of her art. Those of us who weren't born into an acting dynasty can take advantage of acting training and actors' studios instead.