Dave Grohl admits cheating on his wife and says a woman's viral post about his illegitimate child was fake

She is “The Hypocrite”.

Dave Grohl said a woman's viral Instagram post purporting to show his illegitimate child was fake after he admitted to fathering a child outside of his marriage to Jordyn Blum.

A social media user named @valeriegreyston shared a now-deleted photo of a cuddly baby holding a mother's hand on Wednesday with a lengthy caption claiming the little one belonged to the Foo Fighters frontman.

“My sweet Roxie Junie Grohl, being your mommy has already been the most incredible experience of my life,” the post began. “Every day I fall more in love with you and this new role.”

The internet user claimed that Grohl was “from [her] By her side throughout her pregnancy,” she said, adding that she was “grateful for his love and support.”

However, a spokesperson for 55-year-old Grohl told TMZ later on Wednesday that the child in the photo was not the rock star's offspring.

Grohl shocked his fans on Tuesday when he announced via Instagram that he had had a daughter with a mystery woman he hasn't been married to for 21 years.

“I recently became the father of a baby girl born outside of my marriage,” he wrote, adding, “I plan to be a loving and supportive father to her.”

The former Nirvana drummer stressed that he loves his wife and their three children and is doing everything possible to “regain their trust and earn their forgiveness.”

“We are grateful for your consideration for all the children affected as we move forward together,” he added.

Grohl did not reveal the identity of the woman with whom he had the extramarital affair or the name of his newborn child.

The musician has daughters Violet, 18, Harper, 15, and Ophelia, 10, with Blum, 48.

Grohl's two eldest daughters deactivated their Instagram accounts amid the baby drama, suggesting some tension within the family.

He also reportedly hired a divorce lawyer before making this shocking announcement.

The Grammy winner met Blum, a former model, in 2001 at a bar in West Hollywood, California, and the two married in August 2003.

At their last public appearance together at a 2024 Wimbledon match in July – two months before its big unveiling – the couple appeared to be in high spirits.

However, he seemed nervous at the time, as a resurfaced clip shows Grohl yelling at an interviewer at the tennis event.

Last month, Blum was spotted without her wedding ring as she and her husband went out in Los Angeles.