How Old Is Billy Joel's Daughter

So, you’re sitting there, maybe humming “Piano Man” under your breath, and a thought hits you like a rogue shot of whiskey: How old is Billy Joel’s daughter, anyway? It’s the kind of question that feels both deeply trivial and strangely urgent, like wondering if your cat has a secret second family. Don’t worry, you’re not alone—this has baffled bar trivia teams and distracted dads at backyard BBQs for years. Let’s clear the air, shall we?

The answer isn’t just one number—it’s a choose-your-own-adventure situation. Billy Joel has three daughters, each with a different mom, and each one rocks the “musical genius’s kid” title in their own fabulous way. So, when someone asks “how old is she?” you need to clarify which she, because this is a multi-level celebrity parenting saga.

The O.G. Daughter: Alexa Ray Joel

First up is Alexa Ray Joel, born on December 29, 1985. That makes her 39 years old (as of 2025), which is a mind-bender because she’ll always be that toddler with big brown eyes in 80s rock star photos. She’s the daughter of Billy and his supermodel ex-wife, Christie Brinkley—which means she inherited the most unfair genetic lottery in human history.

Alexa is a singer-songwriter herself, and she’s got a piano chops gene that would make her dad weep with pride. Fun fact: she was named after Billy’s hit “Alexa Ray,” but the song actually came after she was born—so she’s the muse, not the other way around. She’s also famously feisty, once calling out the media for treating her like a “celebrity baby” instead of a working musician. Respect.

The Middle Child Mystery: Della Rose Joel

Now, here’s where it gets spicy. Billy and his second wife, Katie Lee (yes, the food critic), had a daughter named Della Rose Joel, born on August 12, 2015. That makes her just 10 years old—a child of the 2020s, which is absolutely wild when you consider her dad’s vinyl-era soul. She’s a tween now, probably not impressed that her dad wrote “Uptown Girl” before she was born.

Wait, hold on. I made a mistake—and it’s the perfect example of how confusing this gets. Della Rose is actually Billy’s daughter with his third wife, Alexis Roderick, not Katie Lee. Katie Lee was actually his second wife, but they had no kids together. See? Even the internet gets this wrong daily. So, let’s reset the timeline because my brain just did a barrel roll.

The Actual Lineup, For Real This Time

Here’s the definitive roster: Alexa Ray (39) from Christie Brinkley; Della Rose (10) from Alexis Roderick; and then the baby of the bunch, Remy Anne Joel, born on October 22, 2017, which makes her a feisty 7-year-old. Remy and Della are full sisters, both with Alexis, and they’re growing up in a mansion where their dad is a living legend who still plays Madison Square Garden like it’s a neighborhood pub.

Billy Joel Shares Sweet Photo with Daughter Alexa Ray to Celebrate Her

So, if you asked “how old is Billy Joel’s daughter” and someone said “she’s 39,” they’re right—if they mean Alexa. If they said “she’s 10” or “she’s 7,” they’re also right, just for different daughters. This is the ultimate dad-joke answer: all of the above.

Why This Question Is So Fun

Billy Joel became a dad for the third time at 68 years old, which is the same age some people are planning their retirement cruise. Instead, he was changing diapers and writing lullabies about the Great American Songbook. That’s a man who truly believes “it’s never too late to start a family”—and also probably never sleeps.

Here’s a surprising fact to drop at your next dinner party: Billy’s youngest daughter, Remy, was born the same year he released his first new pop single in decades, “Turn the Lights Back On.” Coincidence? Absolutely not—the man was overdue to be a rock dad again. And if you think he’s mellowed, think again: he famously said he’d rather play “Piano Man” with a hangover than deal with a teenage Alexa’s first boyfriend. Parenting, rock-star edition.

So, What’s the Takeaway?

If you’re asked the question point-blank, the safe answer is: “He has a 39-year-old, a 10-year-old, and a 7-year-old—pick your poison.” The fun answer is: “Old enough to know better, young enough to still embarrass him at school drop-off.” But the real answer is this—Billy Joel’s daughters are the reason he still tours, still writes, and still looks like a man who just drank a miracle elixir. They keep him young, and he keeps them rich in dad jokes about the 1970s.

So next time someone asks, smile, sip your coffee, and say, “Which one? Because the man spans generations like a musical Benjamin Button.” And if they still look confused, just sing the first line of “We Didn’t Start the Fire” and walk away. You’ve earned the win.