Brian Austin Green keeps his morning busy in Malibu wearing a Rolling Stones face mask

He has been navigating a messy feud with his ex and mother of his three children. 

And Brian Austin Green was keeping busy on Saturday morning in Malibu, California, while on a grocery run to Ralph’s supermarket as well as a coffee pit stop at Starbucks.

The 90210 star, 47, looked distinctive in a black face mask featuring the open lips and tongue of the Rolling Stones logo in red.  

Brian wore a poofy blue winter jacket with a simple black top on underneath.

He paired this with acid wash jeans with elastic cuffs. 

On his feet, he wore black and white Vans checkered slip on shoes. 

The television actor also had on a black knapsack as he loaded his grocery purchases into the trunk of his car. 

Green and his wife, actress Megan Fox, separated late last year into this spring, 10 years after getting married.

At the start of this month, Fox, 34, lashed out at her estranged husband for putting one of their children in a Halloween photo on his Instagram. 

The Transformers star questioned why their youngest son Journey, four, was not cropped out of the shot and claimed it was a tactic to highlight Brian as the better parent.

Commenting on the post, she wrote: ‘I had a great Halloween with them yesterday, and yet notice how absent they are from my social media. 

‘I know you love your kids, but I don’t know why you can’t stop using them to posture via Instagram. 

‘You’re so intoxicated with feeding the pervasive narrative that I’m an absent mother, and you are the perennial, eternally dedicated dad of the year. You have them half of the time.’

She added: ‘Congratulations you truly are a remarkable human! Why do you need the internet to echo back to you what should be inexhaustibly evident in the way your children love you?’

Brain took down the original photo before uploading a new one, with Journey cropped out. 

And as seen this week, the estranged couple are far from dealing with their separation, as Megan has reportedly become ‘unpredictable’ towards her husband.

‘Megan and Brian have taken a turn for the worse because Megan can be unpredictable and inconsistent, which is a big reason that they separated in the first place,’ a source told Us Weekly earlier this week.

‘She can be very hot and cold, hard to keep track of and difficult to deal with,’ they went on.

However, things have been difficult for Brian since Megan has been dating rapper Machine Gun Kelly.

It was reportedly ‘an issue for Brian, then it wasn’t’ but has recently become a ‘more sensitive’ topic.