"It was difficult to write," Macy recently told UPI. "I wanted it to be clear that I could indicate this stuff and people would know what I was saying (even though I was silent.) I had to figure out how to mime everything."
The actor also said he took to heart advice his friend playwright David Mamet once gave him.
"The words aren't that important," Macy noted. "It's your intentions that carry the day. It's not what you say, it's what you WANT that makes things clear."
A dad himself, Macy said he also enjoyed that aspect of the film, too.
"It is about a 'father-daughter' love and that families come in all shapes and colors these days and it's time for us to expand what we have traditionally thought of as a family."
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Aaron Carter is still in love with Hilary Duff