It Ends with Us author and producer Colleen Hoover reveals cancer diagnosis as she shares brave selfie

The author and producer behind Blake Lively's It Ends With Us film has revealed she has been battling cancer as she shared a behind-the-scenes picture from treatment.

Colleen Hoover shared the health update with her 1.9million followers on Instagram on Monday.

Wearing a blue hospital gown and her hair in a messy bun, Hoover grimaced in the mirror selfie as she revealed she was undergoing her 'second to last day of radiation.'

'I wish I could blame my hair and facial expressions on @Texas.Oncology, but they've been great,' she added.

'Hope you never need them, but highly recommend them.'

Hoover is the brains behind both It Ends With Us and Regretting You - both of which became Hollywood blockbusters.

But her It Ends With Us film was overshadowed by behind-the-scenes drama after lead actress Blake Lively filed a legal complaint accusing Baldoni and his production company of sexual harassment and creating a hostile work environment

Baldoni denied the allegations and later filed a $400million countersuit against Lively and her husband Ryan Reynolds, claiming they defamed him and tried to launch a smear campaign.

Wearing a blue hospital gown and her hair in a messy bun, Hoover grimaced in the mirror selfie as she revealed she was undergoing her 'second to last day of radiation'

Wearing a blue hospital gown and her hair in a messy bun, Hoover grimaced in the mirror selfie as she revealed she was undergoing her 'second to last day of radiation'

Hoover is the brains behind both It Ends With Us and Regretting You - both of which became Hollywood blockbusters

Hoover is the brains behind both It Ends With Us and Regretting You - both of which became Hollywood blockbusters

Much of his countersuit was later dismissed by a judge.

Hoover had alluded to a health problem late in 2025 when she missed major milestones ahead of the release of her other film, Regretting You.

 'I'm super bummned, but am having an unavoidable surgery and can't travel for a while,' she wrote in October.

She added she was 'so sad to miss this movie release and premiere, but so grateful to all the actors and the team who put this together.'

Baldoni denied the allegations and later filed a $400million countersuit against Lively and her husband Ryan Reynolds, claiming they defamed him and tried to launch a smear campaig

Baldoni denied the allegations and later filed a $400million countersuit against Lively and her husband Ryan Reynolds, claiming they defamed him and tried to launch a smear campaig

Her It Ends With Us film was overshadowed by behind-the-scenes drama after lead actress Blake Lively filed a legal complaint accusing Baldoni and his production company of sexual harassment and creating a hostile work environment

Her It Ends With Us film was overshadowed by behind-the-scenes drama after lead actress Blake Lively filed a legal complaint accusing Baldoni and his production company of sexual harassment and creating a hostile work environment

Hoover said in a separate Facebook post that the cancer had been 'removed through surgery' and that it would be further treated with radiation.

'While it felt huge and scary for a bit, and I had to miss out on the Regretting You premiere, and some other important career and personal moments, I just wasn't ready to share with anyone until I knew what the outcome would be,' she wrote.

Hoover urged fans to 'listen to your body' and to investigate if something felt 'off.'

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