It's not uncommon in the Hollywood industry to have whole families in the limelight.
From the Beckhams and the Kardashians all the way through to Susan Sarandon and her daughter or Catherine Zeta-Jones and her daughter - it's clear the phrase 'the apple doesn't fall far from the tree' is most definitely the case for a bunch of celebrities including Billie Eilish.
Fans of the 22-year-old 'Ocean Eyes' singer have since been left in complete shock after discovering she has famous mum who once made a cameo appearance in a massive 90s show.
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Billie's mum, Maggie Baird, featured in perhaps the most well-loved sitcom of all time back in 1999.
The episode of Friends, titled 'The One Where Joey Loses His Audience', sees Maggie portraying Casting Director 2, while Joey Tribbiani (Matt LeBlanc) auditions in front of her.
The scene shows Joey losing out on a role he needed in order to pay for his medical care due to a painful hernia.
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The pain means he can't lift the product, instead suggesting: "Or I could just point to it? Blah, blah, blah Purina One. Point to a bag today."
The clip has since resurfaced across social media with many fans of both the TV show and the singer in total disbelief at the unexpected crossover.
Many have since rushed to Instagram to share their reactions with one writing: "HOW DID I NEVER NOTICE WHAT."
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"HOW DID I NOT NOTICE THIS," echoed a second while a third revealed: "I literally just watched this episode and now feeling annoyed that I didn’t notice this."
"I didn't know that! How funny!!!" quipped a fourth.
A fifth chimed in: "OMG NOOOOO FREAKING WAY?!!!!!!!! WHAT? I AM GOBSMACKED!"
"WHEN I SAW HER IN THE SERIES WAS SHOCKED," admitted a sixth whole a seventh piped up: "HOLY SH*T I THOUGHT SHE LOOKED FAMILIAR!"
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"I never knew this and I’m on the last season," chirped an eighth while another added: "Hooooly sh*t!!! That’s why the first time I saw the show, I thought I knew her! Wow!"
And a final Instagram user wondered: "So Billie is a Nepo Baby?"
Now, that's an entire new conversation altogether.
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Billie recently shared with fans a rare insight with her with ex-boyfriend Jesse Rutherford, 33, amid cheating claims.
Speaking to Rolling Stone, the 'Lunch' hit-maker confirmed that she and The Neighbourhood frontman remain on good terms.
"That’s my guy, truly one of my favourite people in the world," she said.
As for her current relationship status, Billie added: "I plan on never dating again. That’s not true, obviously.
"But no, I don’t see myself being serious with anyone until I find someone that really feels right to me, and that is not interesting to me right now."
Topics: Billie Eilish, Celebrity, Music, Friends, TV And Film