"I think he's an amazing artist," she told 7.30 from her home in Berlin.
The celebrated photographer is her godfather, and from the moment she was born via caesarean section, Henson has been documenting her time in the world.
"I've known Bill my whole life," she said.
"When I was 17 he asked me if I wanted to try it out.
"The first time was in Rome, it was just an experiment."
'I was very intrigued'
Heyward is the daughter of leading publishers Michael Heyward and Penny Hueston.