Mark Wahlberg flexed his muscles in a sizzling shirtless video this week – amid David Beckham‘s lawsuit against his fitness company.

The 52-year-old actor — who recently enjoyed a vacation in Sydney — took to his Instagram on Thursday with a shirtless video, gearing up for a 4am workout.

Flaunting his muscular physique, he gives a quick nod to the camera before rallying his 30 million followers with a spirited ‘Let’s go!’

Beckham is suing F45 fitness brand, which Wahlberg owns a 36% interest, after a deal that saw the soccer star promote the company turned sour — and allegedly left Beckham more than $10 million out of pocket.

In April, the British heartthrob filed the suit against the actor and his business associates after the partnership with F45 went south in a row over shares he claimed to have been promised.

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Mark Wahlberg flexed his muscles in a sizzling shirtless video this week – amid David Beckham ‘s lawsuit against his fitness company

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Beckham is suing F45 fitness brand, which Wahlberg owns a 36% interest, after a deal that saw the soccer star promote the company turned sour — and allegedly left Beckham more than $10 million out of pocket; seen in March

The case has rumbled on for several years after Beckham and golfing legend Greg Norman filed cases against F45 in Californian courts in October 2022

The judge reportedly ruled they had to file separate lawsuits.

Beckham’s firm, David Beckham Ventures Ltd (DBVL) had earlier sought damages of as much as $18.85million from F45, according to filings made last year.

But the new case now seeks damages directly from Wahlberg’s Mark Wahlberg Investment Group as well as F45’s founders Adam Gilchrist and Rob Deutsch, according to reports.

Beckham and Wahlberg became friends after the footballer and his family relocated to Los Angeles in 2007.

At the time, Beckham had signed a deal to join Major League Soccer team LA Galaxy.

He then agreed to become the global ambassador for Australian brand F45 in November 2020 – with glossy photographs showing him working out using branded equipment at one of its fitness centers.

Mark Wahlberg has a proud dad moment with daughter Grace

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The 52-year-old actor took to his Instagram on Thursday with a shirtless video, gearing up for a 4am workout

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Flaunting his muscular physique, he gives a quick nod to the camera before rallying his 30 million followers with a spirited ‘Let’s go!’

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While the social media post didn’t directly address Beckham’s legal action, it does exude a sense of dominance amid their courtroom clash; seen in April

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Hollywood actor Wahlberg bought a minority share in F45 in 2019 via his investment company

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Beckham and Wahlberg became friends after the footballer and his family relocated to Los Angeles in 2007

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Beckham’s tie-up with F45 saw him launch an array of themed workouts – with glossy photos showing him working out with F45-branded fitness gear

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He also promoted F45 on his personal social media accounts – with one post made days after the deal was signed (above)

He also shared some posts on his Instagram promoting F45 to his millions of followers as part of the deal. The posts have since been deleted.

As part of the deal, DBVL alleges shares in the company were promised to be shared in early 2022 – but the shares were not divulged until months later, by which time the share price had plummeted from around $12 a share to $3 a share.

Beckham’s lawyers claim this cost him as much as $10 million in potential profit as a result of the delay in issuing his firm with the shares promised in the deal.

The Sun reports that Wahlberg and his co-defendants are seeking to dismiss the allegations of ‘fraudulent conduct’ as baseless and lacking in merit.

F45’s share price in the US has never recovered from its early price of $16.

Shares in the firm are now worth just 15 cents, according to the most recent market data.

The company has been plagued with closures at franchises in several countries including its native Australia, the US, the UK and Ireland.

Wahlberg became a minority shareholder in F45 in 2019 after buying a stake in the company through his investment group.

Representatives for Beckham and Wahlberg have been contacted for comment.