"It's just, we don't want to do it unless it's perfect, because we love it just as much as you guys love it," she said. "It's as important to us as it is to you and we don't want to deliver anything until it's ready. But we're working on it."
The Princess Diaries 1 and 2's director Garry Marshall said in 2016 that he and Disney were talking about The Princess Diaries 3.
"Well, you know, Disney is quite powerful," he said, "and they say they would like to announce—not me—but we are talking."
Marshall also added that they wanted to do the third movie in Manhattan. Sadly, Marshall passed away just months after giving those interviews.
"I think we might do it in honour of him," said Julie Andrews in an interview with Buzzfeed in 2017. "Annie had an idea that she wanted to pursue about it, and I'm all for it, so if she'd like to."
She didn't say when the movie would come out, and production hasn't even started, so there isn't a The Princess Diaries 3 trailer yet. We hope this happens very soon — watch this space for updates!!!