Mark Wahlberg has played plenty of adventurous roles – a Shooter, The Fighter, one of The Other Guys and perhaps most famously a porn star in the 90s hit film Boogie Nights  – but when it comes to investing the Hollywood star prefers a conservative approach.

Having taken a minority stake in the Australian-founded fitness franchise F45 Training, Mr Wahlberg described himself as a cautious investor, but one who is willing to take a risk when he understands the business and can get behind its purpose.