Dave Grohl is seen for the first time since revealing he fathered a secret love child - as he shops for Halloween decorations with his daughter in LA

Dave Grohl was pictured shopping for Halloween decor, in his first sighting since revealing he had fathered a secret love child outside his marriage.

The Foo Fighters frontman, 55, was seen leaving a Spirit Halloween store in Los Angeles on Sunday with his daughter Ophelia, 10, whom he shares with wife Jordyn Blum, 48, along with daughters Violet, 18, and Harper, 15.

The rocker geared up for the upcoming holiday, pushing a cart full of decorations, including two full-size skeletons. 

The former Nirvana drummer sported a casual outfit for the outing, wearing a grey t-shirt, black cargo shorts and a baseball hat. His long hair was pulled back into a bun. 

Grohl shocked fans last month when he confessed to cheating on wife of 21 years Jordyn and welcoming a baby girl with an as-yet unnamed woman. 

For their Sunday outing, Dave — who was recently blasted as a 'scumbag' and 'serial cheater' by ex-girlfriend Kari Wuhrer — also accessorized with a cross necklace.

Meanwhile his daughter sported a relaxed look as well, wearing an oversized black t-shirt, light jeans and sandals. 

After their shopping trip, Grohl packed up his purchases into the back of his truck, and drove off. 

The musician announced in a statement on social media on September 10 that he had welcomed a daughter while vowing to try to 'regain [the] trust' of his wife and their three daughters.

'I've recently become the father of a new baby daughter, born outside of my marriage. I plan to be a loving and supportive parent to her,' Grohl announced to his 1.4 million followers on Instagram.

'I love my wife and my children, and I am doing everything I can to regain their trust and earn their forgiveness.'

He concluded: 'We're grateful for your consideration toward all the children involved, as we move forward together,' he concluded the brief post. 

Grohl did not share any information about his fourth child's mother in the post. 

Grohl and his wife met in 2001 and have been married since 2003. 

Following his announcement that he had fathered a child outside his marriage, his two older daughters both took down their social media accounts. 

Days later his alleged relationship with porn publisher Annaliese Nielsen, 40, was brought to light, with her former friends telling DailyMail.com that she had a 15-year affair with the front man.

Blum reportedly 'turned a blind eye' to Grohl’s behavior throughout their marriage, but she could speak out in the wake of the latest bombshells.

'Close friends believe she has turned a blind eye to Dave's indiscretions for a long time,' the insider said.

'Now he has humiliated her in front of the world with his baby bombshell, she can no longer hide behind the facade of a perfect marriage.'

It was also reported that he recently was arguing with Blum over her 'flirty' relationship with her married tennis coach Christopher Crabb, in what insiders claimed was an attempt to detract from his own indiscretions. 

'Dave Grohl has been jealous for ages about Jordyn’s hot tennis coach,' an insider previously told DailyMail.com.

'They've had arguments about him, and Dave thinks they’ve flirted. Jordyn has told him he’s crazy to even think that. But Dave has persisted.’

His admission about marital infidelity followed an admission to The Guardian in 2007 that he had also cheated on his first wife, Jennifer Leigh Youngblood.

The two married in 1994 but had separated by 1996, and they divorced the following year.

The rock star, who has often been described as a 'family man,' has spoken about the importance of his family in interviews throughout the years. 

In the same Guardian interview, Grohl said: '[My wife] Jordyn and [daughter] Violet are anchors that keep me from completely disappearing.'

Speaking to TIME in 2012, he said his family 'changed everything that I do.'

He added: 'It's changed everything that I do. When you have kids, you see life through different eyes. You feel love more deeply and are maybe a little more compassionate. It's inevitable that that would make its way into your songwriting.' 

While little is publicly known about Blum, People reported she once appeared on the cover of Teen - after being discovered at a supermarket when she was 12. 

Blum was reportedly working as a producer at MTV when she met the frontman.

But Grohl told Elle in 2007 that he was not ready for a serious relationship when they first met, and stopped calling Blum after a few dates.

He shared: 'After three months, I had a revelation and called her back. She picked up the phone and said, "Oh, I never thought I'd hear from you again."'

Meanwhile his band, Foo Fighters, are reportedly 'set to take a hiatus' amid his affair scandal.

The band canceled a gig at the Soundside Music Festival in Bridgeport, Connecticut this past weekend.

Now, reports are suggesting that they are set to take a break as they navigate the aftermath of 'a turbulent few years.'

A source told The Sun: 'The band need time to be with their families and focus on regrouping.'

They added: 'It’s been a turbulent few years, with the loss of their best friend, drummer Taylor Hawkins, the death of Dave’s mum and now the birth of his new child.

'He wants to be at home and focus on earning back the trust of his family. Being on the road isn’t the best thing for any of them at the moment. It feels like a hiatus is the best thing for them collectively.'