It mightn't seem like the most logical way to plead with an allegedly estranged family member, but it's certainly one guaranteed attention.
They claim that they haven't seen Miranda in over a year.
In a television documentary for Australian network ABC1, entitled Family Confidential, they open up about their relationship with Miranda, her childhood and the breakdown of her marriage to Orlando Bloom.
“Miranda's life is so different now [and] she's surrounded by 'yes' people all the time. It's so important for me to be real, to be true, to be who she needs me to be," her mother Therese said.
Miranda's father John, brother Matthew and grandmother Ann also feature in the programme.
The family doesn't specify any rift in particular, adding that there is simply an increasing distance between her and the rest of the family.
"We have been best friends for most of our life. We used to talk just about every day,” Therese said.
“What I have to do is let go and allow her to be assertive and lead her own life. And I guess for any mum that's a little bit challenging sometimes to do that.”
And John alleges that it was her ex, Orlando Bloom, who called the family to break the news of their split.
“I remember him saying 'we're always going to be family' and that's how we'll treat Orlando, Miranda and Flynn. We're all family,” John said.
However, the family are optimistic that Miranda will return to Oz from her current base in New York.
“I miss the baby and I think he's missing out on family, that closeness that we have always had,” her grandmother Ann added.
“It's very nice where they are but nothing like Australia, nothing, and I think hopefully Flynn might end up here. We just keep our fingers crossed.”
“What I'd really like to do as a granddad now is teach Flynn how to milk a cow, how to ride a horse, teach him all them country things,” John Kerr says.
“I wish she was just a normal, everyday girl, I really do,” says her father John, adding that Miranda's brother Matthew has been affected by her fame.
A spokeswoman for Miranda said she is “grateful to her parents, brother and extended family in Australia for their ongoing support and love”.