Hollywood A-lister Leo (l) and singing superstar James (r) have teamed up on a business venture (Pictures: Getty)

Leonardo DiCaprio has become a business partner of James Blunt and it’s the collaboration we didn’t know we needed.

The Killers of The Flower Moon actor, 48, and You’re Beautiful hitmaker, 49, have both reportedly invested in LØCI – a British vegan trainers brand – after being persuaded to support the company by Princess Eugenie, their mutual friend.

The shoes have actually become popular with various members of the royal family, with Eugenie introducing the product to Prince Harry and his wife, Meghan Markle.

‘Eugenie was introduced to the brand by her good pal Sofia, James’ wife, and attended its launch event last year,’ a source told The Sun newspaper’s Bizarre column.

‘She is connected to Leo through some of her Hollywood pals and inspired him to invest last summer.’

The insider added: ‘[Eugenie] has since introduced the trainers to Prince Harry and Meghan as well as other environmentally-friendly royals.

Leonardo DiCaprio has invested in footwear brand LØCI (Picture: Andreas Rentz/Getty Images)

Both he and James Blunt are invested in the brand, making them business partners (Picture: Dawn Fletcher-Park/SOPA Images/REX/Shutterstock)

The pair were introduced to the brand by their mutual friend, Princess Eugenie (Picture: Stuart C. Wilson/Getty Images)

‘James has now invested too, so he is technically in business with Leo. It’s random but a cool connection for them both.’

The company uses ‘premium repurposed ocean and land plastic’ and is also popular with the likes of Ed Sheeran and Ben Affleck.

DiCaprio is well-known for his environmental activism and in 2016, he starred in a documentary film called Before the Flood that focused on the issue of climate change.

Speaking about the documentary, he previously explained: ‘We went to every corner of the globe to document the devastating impacts of climate change and questioned humanity’s ability to reverse what may be the most catastrophic problem mankind has ever faced. There was a lot to take in.

‘All that we witnessed on this journey shows us that our world’s climate is incredibly interconnected and that it is at urgent breaking point.

‘We wanted to create a film that gave people a sense of urgency, that made them understand what particular things are going to solve this problem.’

Blunt also supports numerous environmental causes and has previously used his concerts as an opportunity to platform this as he screened trailers for 2006 global warming documentary An Inconvenient Truth.

In 2007 he also performed at the Live Earth concert at Wembley Stadium in London, and in 2010 released his own cover of Everybody Hurts by R.E.M. in aid of the Haiti earthquake appeal.

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It’s a product beloved by royalty.