Little Jack Turnbull-Brown has stolen many a show this campaign.
But on Thursday the prime minister's grandson was used to make a point.
How old will Jack be before the nation's mortgage is repaid, Mr Turnbull was asked as he made his pitch to the National Press Club on Thursday.
The questioner, a Canberra talkback radio presenter, noted the toddler had become well-known during the last eight weeks.
"That is a good question," Mr Turnbull said, as the room chuckled.
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He was quick to remind the budget will be back in balance in mid-2021 under the coalition.
Jack wasn't the only member of the Turnbull clan to feature in the pre-polling day address.
Asked to lay out his case for why gay marriage should be legalised in Australia, Mr Turnbull drew on his 36-year marriage.
"We have no doubt that if gay couples, same-sex couples, were able to describe or formalise their relationship as a marriage, we have no doubt that that would not undermine or affect in any adverse way our relationship," he said, as Lucy watched on.
The pair will be voting yes, but respect the views of others who disagree with same-sex marriage.
That would include Treasurer Scott Morrison, sitting only metres away.
Mr Turnbull used his set-piece speech to call for end to the "juvenile theatrics and gotcha moments" of modern Australian politics.
To offload the ideology.
But he couldn't help sticking to the script - spruiking the merits of his economic plan, the need for stability, the exciting nature of our times.
Yet as hard as he tried, he couldn't dodge questions about how safe he will be in the top job should Australians vote him back in on Saturday.
After pledging on Monday to be in charge by the time of the 2019 election, he admitted it was only a prediction.
"Only time will tell," he said, with a grin.
