Trump Jnr: 'I was brought up not to trust'
Married three times, Donald Trump has brought his three oldest children into the business.
However, what is it like to work with such a strong and pugnacious personality, who - to top it all - is also your father?
Don Jnr, Ivanka and Eric Trump tell their story.
Donald Trump: All-American Billionaire is on BBC Two on Sunday, 28 November, at 2100 GMT