David Harbour’s alleged mistress Natalie Tippett hits back at Lily Allen’s ‘false’ affair claims

David Harbour’s alleged mistress, Natalie Tippett, slammed the actor’s estranged wife, Lily Allen, for pushing a “false narrative” about the affair.

“I was hoping to not speak on this, but I am tired of this false narrative being pushed and circulated,” the costume designer wrote on her Instagram Stories Sunday.

“This was such a marginal part of my life, but it’s now turned into a major disruption,” she added.

Natalie Tippett in an Instagram photo.

David Harbour’s alleged mistress, Natalie Tippett, slammed the actor’s estranged wife, Lily Allen, for pushing a “false narrative” about the affair.
Instagram/Natalie Tippet
Lily Allen and David Harbour at the “Violent Night” premiere.
Tippett was accused of breaking up Harbour’s marriage to Allen.

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The mom of one then shut down rumors that she was Harbour’s other woman for several years.

“I did not have a three-year affair with anyone. I’m unsure why this person wants so badly to pit people against me or create this narrative that we both know is false based on the actual messages that I have saved between us,” she wrote, seemingly referring to the “Smile” singer.

Tippett said her and Allen’s messages were “referenced in a song” without her consent.

Natalie Tippett’s Instagram story statement denying a three-year affair and expressing feeling violated by messages.

“I’m unsure why this person wants so badly to… create this narrative that we both know is false based on the actual messages that I have saved between us,” she wrote, referring to the “Smile” singer.
Natalie Tippett/Instagram
Screenshot of an Instagram story by natalie_tippett that reads, “I am a single mother with my own struggles, but I am happy and I wouldn’t trade my life for anything. I’m aware of the repercussions speaking out on this this may cause, but I can’t imagine anything worse than what’s already been said, as well as having to watch someone profit off of painful lies… so at this point at least I’ve said my truth and on my own terms. Please remember before you send more hate my way, I’m a human being not a character someone created.”
Tippett, 35, said that though she is a single mother and has her own struggles, she “wouldn’t trade [her] life for anything.”

 

“I feel extremely violated, and I would love to stop getting messages telling me to die and other obscene things that I won’t share on this platform,” she continued.

“I’m not sure why any fixation landed on me, I don’t weaponize women against women for the behavior of men, especially not in an open relationship. I’m wishing her all the success, money, healing and happiness and whatever else she’s seeking through this.”

Tippett, 35, said that though she is a single mother and has her own struggles, she “wouldn’t trade [her] life for anything.”

“I’m aware of the repercussions speaking out on this may cause, but I can’t imagine anything worse than what’s already been said, as well as having to watch someone profit off of painful lies… so at this point at least I’ve said my truth and on my own terms,” she wrote.

Natalie Tippett wearing a light blue bikini, lying on a lounge chair outdoors.
In October, the Daily Mail reported that Tippett was the “Stranger Things” actor’s alleged mistress after Allen got candid about her husband’s affairs on her new album, “West End Girl.”
Natalie Tippett/Instagram
Lily Allen attends the 2025 CFDA Awards.
On the song “Madeline,” Allen, 40, sang about Harbour breaking the rules in their “open” marriage.
GC Images
“Please remember before you send more hate my way, I’m a human being not a character someone created,” Tippett concluded.

Page Six has reached out to Allen’s reps for comment but did not immediately hear back.

In October, the Daily Mail reported that Tippett was the “Stranger Things” actor’s alleged mistress after Allen got candid about her husband’s affairs on her new album, “West End Girl.”

On the song “Madeline,” Allen, 40, sang about Harbour breaking the rules in their “open” marriage.

“Of course I’ve heard the song,” Tippett told the outlet while allegedly rolling her eyes.

David Harbour in New York City after shopping at Bloomingdale’s in Manhattan’s SoHo area.

The Daily Mail reported Tippett initially met Harbour, 50, in 2021, when she worked in the costume department of the Netflix film “We Have A Ghost” and they allegedly began an affair after filming began.
BrosNYC / BACKGRID
Lily Allen in a feathered gown and David Harbour in a tuxedo at the Met Gala.

Allen reportedly found out about Harbour’s affair from texts on his phone.
Getty Images for The Met Museum/Vogue
The Daily Mail reported that Tippett initially met Harbour, 50, in 2021, when she worked in the costume department of the Netflix film “We Have A Ghost” and they allegedly began an affair after filming began.

Allen reportedly found out about Harbour’s affair from texts on his phone.

When Tippett was asked by the Daily Mail if she knew her private texts with the “Hellboy” star were being used in Allen’s songs, she replied, “Yeah. I just don’t feel comfortable talking about it at the moment.”

Last month, the Daily Mail reported that Tippett was at the Thermea Spa Village in Winnipeg, Canada, at the same time Harbour was in the city filming “Violent Night 2.”

Natalie Tippett takes a mirror selfie in a brown crop top, plaid skirt, and knee-high boots.
When Tippett was asked by the Daily Mail if she knew her private texts with the “Hellboy” star were being used in Allen’s songs, she replied, “Yeah. I just don’t feel comfortable talking about it at the moment.”
Instagram/Natalie Tippet
British singer Lily Allen and actor David Harbour posing on the red carpet at the West End world premiere of “Stranger Things: The Last Shadow” stage play.

In February, news broke that Allen, who married Harbour in 2020, and the actor were separating.
AFP via Getty Images

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“We know that he and Natalie have been together recently,” a source told the outlet.

In February, news broke that Allen, who married Harbour in 2020, and the actor were separating.

The Grammy nominee filed for divorce in September.