So, you’re wondering: how old is Billy Joel’s daughter? Let’s cut to the chase. The famous answer is Alexa Ray Joel, his first child with model Christie Brinkley. She was born on December 29, 1985.

Do the math, and you’ll see she’s 39 years old as of 2025. Yes, the “Baby Grand” of his hit song is now pushing forty. It makes you feel a little old, doesn’t it?

The Song That Started It All

Billy didn’t just write a lullaby. He wrote a whole song called “Alexa Ray” for her. The lyrics are sweet, but the title has a spicy twist.

Alexa Ray is a combo name. “Alexa” honors legendary jazz pianist Alex (Alexa) and “Ray” comes from the Ray in Ray Charles. Talk about a musical pedigree inside a name!

Not His Only Daughter

Here’s a fun curveball: Billy Joel has two daughters. His second daughter, Della Rose Joel, was born in 2015 with his current wife, Alexis Roderick. That makes Della Rose 10 years old in 2025.

So the age gap between sisters? A whopping 30 years. Yes, Billy became a dad again at 66. Rock and roll, huh?

All About Billy Joel's 3 Daughters: Alexa, Della, and RemyAll About Billy Joel's 3 Daughters: Alexa, Della, and Remy

Alexa’s Grown-Up Life

Alexa Ray isn’t just a famous name on a birth certificate. She’s a legit singer-songwriter and pianist herself. She even performed at her dad’s 100th Madison Square Garden show in 2018.

She once told a fun fact: she has a photographic memory for musical notes. But she still can’t remember her dad’s birthday without a reminder. Classic family dynamic.

Why This Number Matters

Why do we care so much about her exact age? Because Billy Joel’s songs are timeless. “She’s Always a Woman” was written before she was born. Yet the tune feels like yesterday.

Billy Joel gushes 'we love you!' as singer shares very rare photos ofBilly Joel gushes 'we love you!' as singer shares very rare photos of

Knowing she’s 39 makes you realize the 1990s are now retro. That’s a weird, fun punch in the gut for anyone who owned a cassette tape.

The Real Quirky Bit

Here’s the kicker: Billy Joel once joked in an interview that he still calls Alexa “the baby.” She was 35 at the time. He said, “She’ll be 50 and I’ll call her baby.” Dads, am I right?

Also, Alexa hates the song “Uptown Girl” because it was written about her mom. Imagine hearing your parents’ love anthem at every karaoke night. She’d rather sing “Piano Man.”

Billy Joel Shares Rare Photos of 9-Year-Old Daughter Della Rose for HerBilly Joel Shares Rare Photos of 9-Year-Old Daughter Della Rose for Her

So, What’s the Takeaway?

Billy Joel’s daughter Alexa is 39. Della is 10. The Piano Man has a full house, from pre-teen to pre-forty. He still writes songs, but now he’s writing homework notes, too.

Next time you hear “Just the Way You Are,” remember it was a hit before Alexa was born. Then she turned 39. Time flies when you’re having fun—or playing a twelve-minute “Scenes from an Italian Restaurant.”

Curious about more? Look up Alexa’s 2017 single “Notice Me.” She’s got her dad’s grin and a voice that’s all her own. Age is just a number, but this number is fun to talk about.