Okay, so we’ve established they’re in their twenties—so what? Well, it’s interesting because it places them in a very specific generational pocket. They’re not Gen Z teenagers, but they’re also not the full-on millennials who remember dial-up internet.
They’re “Zillennials”—that weird cusp group who can recall a childhood without smartphones but also knew how to use an iPod nano. That’s a cool, tiny cultural detail that makes their ages feel more like a vibe than a number.
Plus, Fiona has been refreshingly open about raising boys in the public eye. She once joked that they were her “harshest critics” for her TV work, which is both hilarious and totally relatable. Who hasn’t been roasted by a teenager?
The Alzheimer’s Piece (It’s Not All Light)
Fiona revealed in 2026 that she had been diagnosed with early-onset Alzheimer’s, which naturally puts her sons’ ages into a more serious context. Nat and Mackenzie were in their early twenties when that news broke—a time when most of us are still trying to figure out how to do laundry properly.
Suddenly, their ages aren’t just trivia; they show a generational shift in responsibility. They went from being her “little lads” to young men who likely became her support system. That’s heavy, but it also reveals their quiet strength.
Fiona Phillips 'distressed' after failing to recognise her own son in
It reminds us that, behind the glossy headlines, these are real people dealing with real life. Their ages now—late twenties and early twenties—means they’re old enough to understand the weight of it all, yet young enough to still have that primal need for their mum.
