Miller, who passed away in July aged 84, was remembered on Friday as a protector, adviser, father, larrikin and the man who launched the careers of stars including Marcia Hines and Jon English.

He typically wanted control over the proceedings and left explicit instructions about how the Capitol Theatre service was to play out.

Miller's biographer Peter Holder addressed those gathered and read a tribute on behalf of Chamberlain-Creighton, who enlisted the agent after her baby Azaria was taken by a dingo in 1980.

"When everyone is clamouring for a piece of you all at once, you need someone to help you navigate the overwhelming onslaught and Harry is the best human guard dog you could get," Chamberlain-Creighton wrote.

"Just like an Alsatian."

Holder said Miller knew what it meant to be on the "wrong end of the media stick" so felt well qualified to protect the besieged.

Several clients and industry legends became lifelong friends.

"I don't think we'll ever see another like him. I loved you, Harry," former media personality Maggie Tabberer said.

Miller was still in his 20s when he brought US jazz musician Louis Armstrong to Australia.

He was later behind tours of the Rolling Stones, conductor Artur Rubinstein, the Beach Boys and Sonny and Cher.

Miller consolidated his reputation in 1969 by staging the American musical Hair in Australia and later became an agent to the stars.

He was diagnosed in 2011 with vascular dementia - a disease that eventually killed him.

Miller is survived by his third wife Simone Logue and his five children - sons Simon and Miles and daughters Brook, Lauren and Justine.

Australian Associated Press