We've seen some peculiar instances of celebrities supporting obscure clubs down the years, and even UK television show Soccer AM tried to encourage stars on air to select a club at random.
But it's hardly a difficult choice for a visiting celebrity to select a club based in one of the richest parts of the country. And given that, it's unsurprising to see some celebrities who follow Chelsea are in the "well-known" category.
Some are lifelong fans, and you'll certainly know where to make the distinction.
Others, however, simply opt to head into the Di Matteo Suite and pop open a bottle of Dom Perignon, catching a glance at maybe 10 or 20 minutes of the Blues in action.
Still, we've compiled a list of the 10 most famous celebrities who follow Jose Mourinho's boys in Royal Blue. Come have a look, won't you?
Lord Richard Attenborough, Film Director
This is truly one of the best examples of a lifelong fan of Chelsea Football Club.
Although he is now famous for his film directing, and rightly so, Richard Attenborough has been supporting the Blues for an incredible 71 years. In this article by Andrew Baker from The Telegraph, Attenborough recalls back in 2007: "I went and stood on a bank with a packet of sandwiches with my girlfriend who I eventually married, principally because she agreed to follow Chelsea, and we've been going since 1942."
Attenborough shares a great respect with current manager Jose Mourinho, who is back at the club after a six-year absence, and claims that after a triple-family bereavement after the Tsunami in Asia, Mourinho comforted him "without any ostentation, he just made his way across the room – I hardly knew him – and put his arms round me."
It's clear that 89-year-old Attenborough, whose health is in decline, will always be a Blue.
Will Ferrell, Comedian/Actor
If you've been looking hard for that distinction, here he is. Comedy actor Will Ferrell, famous for his roles in Anchorman, Blades Of Glory and Step Brothers has recently become enticed with the club's popularity in the U.S.
The lovable, frizzy-haired comedian jumped on the bandwagon like many other Americans after Chelsea made their trip to the USA last year, and he was pictured with another film star, Zach Galifianakis, while the Blues toured through different states.
He's not since made the trip over, but no doubt as the Blues look to conquer several quarters of the other side of the Atlantic, Ferrell will be back in Blue in the not-too-distant future.
Tim Lovejoy, TV Presenter
The former Soccer AM presenter is a lifelong Blues fan and made his love to the club clear when he joined the programme way back in 1996.
Now a key figure of the Blues fan movement, Lovejoy has taken a step back from football and into the kitchen, featuring on cooking shows such as Something for the Weekend and Sunday Brunch. He has three kids and now dates a British Netball star.
Maybe he can convince her to come along, too?
Nigella Lawson, TV Chef
After being recently in the limelight for the wrong reasons, Nigella Lawson must be counting the days before she can watch her beloved Chelsea once again.
Her controversial split from advertising guru Charles Saatchi has brought about many criticisms, but the TV chef must be hoping she can put it behind her and focus on cooking and football ahead of the new season.
She may have moved out of her Chelsea home, but her home will always be Stamford Bridge.
Geri Halliwell, Member of the Spice Girls
"Ginger Spice," as she is more famously known, was recently seen supporting her friend, Christine Bleakley, at a Chelsea match. According to Georgina Littlejohn of the Daily Mail, she even cheered when Bleakley's fiancee, Frank Lampard, scored.
She's come under fire for becoming a Chelsea fan after the Roman Abramovich takeover, and some view her simply a token fan, not a genuine supporter, due to the fact she was born in Hertfordshire and not London.
Of course, it was not her first match as a fan, but it was certainly her first for a while, and with Lampard scoring, perhaps Geri is a lucky charm.
Lord Coe, London 2012 Olympic Chief
Being responsible for delivering one of the world's most memorable Olympic games to date must be a tall order, and so what do you do when you're on a rather large salary with nothing to do?
Visit your local club is what former MP and track athlete Sebastian Coe does. A lifelong Blues fan, it's perhaps a surprise then that Stamford Bridge was not among those considered to host the Olympic football tournament.
Peter Crouch, Footballer (Stoke City)
Talk about split loyalties, Peter Crouch must have a gut-wrenching feeling when he plays against Chelsea.
The towering forward, currently on the books at Stoke, is not exactly a hardcore supporter of the Blues. In fact, everyone in his family, including his father, has a season ticket.
Even despite Crouch supporting QPR as a child, he was forced to watch Chelsea and generally has a sweet spot for them, but he must decide between his family and his career in a quick moment when he has that chance to score.
Sir Steve Redgrave, Five-Time Olympic Gold Medalist in Rowing
Any British fan of the Olympics will know just how much Sir Steve Redgrave has achieved during a wonderful 16-year career.
Despite his commitment to rowing and other sports, Redgrave reserves a special spot for his beloved Chelsea and tends to go down to support the club whenever he can; he even helped out with the FA Cup draw once!
Boris Becker, Former Tennis Player
The legendary German is more known in these parts for smashing the ball around the tennis court with great precision and experiencing much success. However, despite his commitment to tennis, it may come as a surprise as to just how involved Boris Becker is with the beautiful game.
In an interview with ESPN, Becker explains that, first and foremost, he is a Bayern Munich fan through and through. After all, he was a director on the board for 10 years, and while he didn't grow up near Munich, he grew up with Bayern as the main team in Germany.
He admitted that his support for Chelsea has grown since he moved to the area a decade ago, claiming that he has a good relationship with the likes of Didier Drogba and Frank Lampard, although he supported the Bavarian side in the Champions League final. Nevertheless, I'm sure they will forgive him if he comes to support again.
Bill Clinton, Former U.S. President
Rumour has it that when former U.S. president Bill Clinton was studying for his degree at Oxford during the 1960s, he would often go to Stamford Bridge to watch Chelsea play.
Whether it was just something to do with friends or if he genuinely held an affection for the Blues is unclear. But to have a president from one of the biggest countries in the world supporting the club is surely a good message for the Blues and how well their brand has been spread across the globe.
No doubt with President Obama over the road at West Ham, London is becoming a hot spot for U.S. presidents.
Hillary Clinton for Tottenham/Arsenal anyone?