The main qualities required are:
Just like at any job interview, there are many people going for one part at auditions. The difference for actors is that they constantly have to audition for parts. This means that they have to be able to cope with rejection and to learn from each experience. Maintaining a positive attitude is important as it will often take many auditions for an aspiring actor to get his/ her first part. Being determined and dedicated will help in this situation as attending as many auditions as possible should eventually end in a successful audition. In such an expressive career in arts and entertainment, it is often the people who are most passionate about what they are doing who are most successful. Someone who wants to be a star only to achieve fame and fortune is unlikely to be successful. A genuine love of the arts and of performing is a necessity for anyone thinking of pursuing an acting career - this will shine through in performances and will ultimately help achieve success.