In the world of pop culture, Billie Eilish has always kept her romantic life mysterious. Known for her deeply introspective lyrics, unique fashion sense, and fiercely guarded privacy, the Grammy-winning star rarely lets fans peek behind the curtain of her personal world.
But when sharp-eyed fans noticed her getting unusually cozy with her longtime guitarist Andrew Marshall, the internet lit up with one burning question:
Is Billie Eilish secretly dating her guitarist?
From flirty stage chemistry to suspicious social media posts, we’ve gathered every clue, fan theory, and expert take to break down whether this is the next power couple in the making — or just another rumor fueled by wishful thinking.
🎤 Who Is Billie’s Guitarist, Andrew Marshall?
Before we dive into the relationship rumors, let’s meet the man at the center of it all.
Background on Andrew Marshall:
- Profession: Touring drummer and occasional guitarist for Billie Eilish (yes, he’s also a skilled multi-instrumentalist)
- Education: Berklee College of Music graduate
- On Tour Since: 2019
- Social Presence: Known for being low-key, but often reposts Billie-related content
Fans have pointed out that Marshall isn’t just a background musician — he’s a core part of Billie’s live band, appearing in nearly every performance from Coachella to Glastonbury.
While he’s never been known for chasing the spotlight, that hasn’t stopped fans from obsessing over their interactions.
💘 The Chemistry on Stage
One of the biggest sources of speculation? Their body language during live shows.
Viral Moments Fans Noticed:
- The “Ocean Eyes” Glance
- During a June 2024 show in Paris, Billie sang her emotional breakout hit while locking eyes with Marshall for a full 12 seconds.
- A fan edit of the moment reached 9 million views on TikTok.
- The Shoulder Brush
- In Atlanta, Billie walked past him on stage and briefly brushed his shoulder — a tiny moment, but fans were quick to point out her smile immediately afterward.
- The Glastonbury Hug
- After the final song, Billie ran across the stage to hug Marshall first, before acknowledging the rest of the band.
- Some fans called it “too warm to be platonic.”
What Experts Say:
Body language analyst Dr. Ava Gordon told PopCultureMag:
“There is a consistent pattern of subtle touches, mirroring, and shared smiles — classic signs of emotional closeness.”
Of course, that doesn’t confirm romance, but the chemistry is undeniable.
📸 Social Media Clues: Too Many Coincidences?
Billie’s Instagram and TikTok are often cryptic, but eagle-eyed fans have pieced together several clues suggesting something deeper.
Matching Posts
- January 2025: Both Billie and Andrew posted photos from a snowy cabin getaway — within 24 hours of each other.
- While neither tagged the location or each other, the pinewood interiors and mugs in their selfies matched perfectly.
Behind-the-Scenes Snaps
- In a now-deleted TikTok, a background clip from Billie’s tour vlog showed her playfully pushing Marshall into a pool while laughing hysterically.
- Fans who slowed the video down swear you can hear Billie say “love you” before the cut.
Recent Instagram Caption (June 2025):
“You know who you are 🖤”
– posted by Billie after the final stop on her tour.
Marshall replied with a single black heart emoji. Over 100,000 likes later, fans were convinced.
🧠 Fan Theories: What Reddit and TikTok Are Saying
Pop culture detectives across the internet have no shortage of theories.
TikTok Theory #1: “They’ve Been Together Since 2023”
- Based on old paparazzi pics of Billie and Marshall leaving rehearsals together in L.A.
- A user @EilishExpose created a 10-minute timeline video linking their interactions across two years
Reddit Deep Dive: “The Mysterious Necklace”
- In multiple fan photos, Billie is wearing a tiny silver guitar pick necklace
- Redditors believe it’s a custom gift from Andrew — he reportedly used a matching pick during several shows
One user wrote:
“This isn’t just stage chemistry. They’re soft-launching a relationship, and we’re all witnessing it.”
⛔ Counter-Arguments: It Could All Be Platonic
Not everyone is buying the romance rumor.
Reasons to Doubt:
- Billie is known to be very physically affectionate with close friends
- Marshall has never spoken publicly about Billie in a romantic context
- She’s fiercely private about love — remember how long she hid her relationship with Jesse Rutherford?
Fan Reaction:
“We need to stop shipping every guy Billie hugs.”
“Let them have a professional friendship without assuming romance.”
Still, even skeptics agree: something feels different this time.
🎶 Lyric Hints from Billie’s New Songs
Another major source of speculation? Her recent album, “Dogtooth.”
Fans believe several tracks might be inspired by someone close — maybe too close.
Song: “Slow Burn”
“You never speak first / But you always know / When I’m about to come undone”
– Fans believe this is about someone intuitive — like a bandmate.
Song: “Studio 16”
“We laughed behind the drum kit / Silence was enough”
– Direct reference to someone who plays drums?
Song: “Unlisted Track” (only on vinyl edition)
- This mysterious bonus track has not been uploaded to streaming platforms, but snippets suggest it’s a love song with lyrics like: “You know the real me, no glam, no lights / Just our music and firelight.”
While Billie hasn’t confirmed the muse, fans are certain they know who it’s about.
📽️ The Documentary Theory
Upcoming Hulu Doc “Inside Eilish: Part 2” (Fall 2025)
Rumors are swirling that Billie’s new behind-the-scenes doc will feature more intimate moments than her previous films.
Insiders claim Andrew appears frequently — and in ways that “blur the lines between friendship and something more.”
Could the doc finally reveal what’s going on behind the scenes?
🧍♂️ What About Andrew Marshall’s Past?
Despite being low-profile, fans have done some digging.
Past Relationships?
- No public girlfriends or dating scandals
- One old photo surfaced from 2017 showing him holding hands with a mystery woman — but she’s never been identified
Personality Insight:
According to those who’ve toured with him, Marshall is known for being:
- Quiet and extremely protective of Billie
- Professional, but with a warm sense of humor
- “The calm in the chaos,” according to backup singer Joelle Rose
A source close to the tour team reportedly told PopBuzz:
“If Billie ever wanted to date someone safe, grounded, and completely out of the fame bubble — it would be him.”
💬 What Have Billie or Andrew Said?
Billie’s Interview with Rolling Stone (July 2025):
When asked directly about her dating life, she said:
“I’m good. I’m safe. I’m happy. That’s all I’ll say.”
Cryptic, but telling.
Andrew’s Q&A on Threads:
When asked “Are you dating Billie Eilish?” he responded:
“LOL. You guys need a hobby.”
Then added:
“Much love, always 💚”
Some saw it as a denial, others thought it was a soft confirmation.
🎯 Conclusion: Are They Dating?
While neither Billie nor Andrew has publicly confirmed a relationship, the mounting evidence paints a compelling picture:
PROS:
- Frequent physical affection on stage
- Social media overlaps
- Romantic song lyrics that seem to match their timeline
- Fans, body language experts, and tour insiders all pointing to something deeper
CONS:
- No hard proof (no kiss, no holding hands in public)
- Could simply be a deep friendship
- Billie’s history of misleading the public to protect her privacy
📢 Final Verdict
Is Billie Eilish secretly dating her guitarist Andrew Marshall?
We can’t say for certain — but where there’s this much smoke, there’s usually fire. Whether it’s an unconfirmed romance or a platonic bond stronger than most friendships, the chemistry between Billie and Andrew has fans completely captivated.
Until they speak out (if ever), we’ll be watching every post, every lyric, and every on-stage glance with curiosity — and maybe a little hope.