P Diddy
Mr Clooney's deal with Diageo isn't the first time the maker of Smirnoff and Baileys has looked to star power for its tequila sales.
It became one of the many businesses rapper P Diddy, who signed a joint-venture deal with Diageo to buy premium tequila DeLeón, has used to make his reported $820m fortune.
In addition to DeLeón, P Diddy has also had stakes in a clothing line, a soft drinks brand and a record label under his umbrella company Combs Enterprises.
Oprah Winfrey
At the height of her career she was the highest paid TV star in the United States. Not only did Oprah Winfrey host the show, but she also owned it as well.
In addition to her eponymous TV chat show, her company Harpo Productions has also made Oscar-winning feature films Selma and Precious and TV talk show Dr. Phil.
She also has stakes in a magazine published in collaboration with media giant Hearst and a women's cable network called Oxygen Media.
Liam Gallagher
Musicians releasing a clothing range is a well-trodden path and Liam Gallagher's look is one of the most iconic of the 90s.
His brother Noel said that Liam's range, Pretty Green, had become a sticking point between the brothers just before Oasis' split with Noel refusing to allow the clothing line to be advertised in their concert programmes.
Liam also owns a production company, 1 Production, which said in 2010 it was making a film on The Beatles but it is yet to materialise.
Bono
U2 lead singer Bono's stake in Elevation Partners, a private equity firm focused on new media and technology companies, could prove to be one of the most lucrative endeavours on this list.
The firm, which is named after the U2 song Elevation, reportedly has $1.9bn of assets under management and has stakes in Yelp, Facebook and Forbes as part of its portfolio.
Ashton Kutcher
Two and a Half Men star and former Punk'd presenter Ashton Kutcher has also invested in private equity, having co-founded technology-focused A-Grade Investments.
The company has acquired stakes in 'sharing economy' heavyweights Uber and Airbnb and music pioneers Soundcloud and Spotify. Mr Kutcher has had less success elsewhere in the business world with Japanese restaurant business Geisha House going out of business in 2013.
Jay Z
With stakes in record labels, clothing ranges, an app maker, a music streaming service and a wine and spirits company, Jay-Z undoubtedly has the most eclectic portfolio on this list.
Forbes has estimated his wealth at $810m with his new music streaming service Tidal making him the second-wealthiest hip-hop star in the world behind P Diddy and ahead of headphones-creator Dr Dre in third place.
