And she's not the only star who has completely changed her name...
When Queen Elizabeth gave her official consent for Meghan Markle and Prince Harry to get married, we had to take a minute. The official document revealed something that threw us for a loop: namely, that Meghan Markle's name isn't actually Meghan. Her real name is actually Rachel Meghan Markle, which is a pretty wild coincidence given that her Suits character is funnily enough called Rachel.
And that wasn't the only big revelation however. It turns out that Prince Harry actually officially goes by 'Prince Henry'. It turns out that he's almost always referred to by his nickname Harry and TBH Prince Henry just doesn't have the same ring to it in our opinion.
They aren't the only celebrities who have chosen to go by a different name however. There's a whole host of reasons why a celebrity may decide to change their name, from preferring their middle name, to wanting a shorter, snappier name - or just because they don't think it's glamorous enough for an A-Lister.
From Gigi Hadid to Jude Law, Rihanna to Lana del Rey, there's a whole host of A-Listers who have opted for something completely different, be it their childhood nickname or variation of their actual names.
And would Reginald Dwight have ever been any where near as successful a singer-songwriter as Elton John? We'll never know, but Elton clearly didn't think so, and so ditched his real name.
There are probably a lot more celebs in the world who don't use their real name than you first thought, so we've rounded up the most interesting of celebrity name-changers out there...
Meghan Markle
While the world may now know the Duchess of Sussex as Meghan Markle, it turns out that her real name is actually Rachel Meghan Markle.
Cardi B
Listen to any Cardi B song and you'll hear the rapper frequently name-dropping herself, however did you know that isn't even her real name? It turns out it's Belcalis Almanzar - doesn't roll off the tongue quite like Cardi B does to be honest. Credit: Andrew H. Walker/REX/Shutterstock
Elle and Dakota Fanning
First up it's actresses and sisters, Elle and Dakota Fanning. Did you know that these two both actually go by their middle names?
Their full names are in fact Mary Elle Fanning and Hannah Dakota Fanning.
Speaking to Glamour, 18-year-old Elle said: 'I just never went by Mary, like ever. It's possibly a southern thing, I don't know.' So there you have it.
Gigi Hadid
Did you know one of our favourite supermodel's full name is actually Jelena Noura Hadid? Gigi is a nickname that her mum, Yolanda, gave to her when she was little because Jelena was too confusing, and it stuck. It was also Yolanda's nickname when she was little, too. Aww.
Prince Harry
As we scanned Twitter during the Olympics closing ceremony in 2012, one thing seemed to baffle people more than most - that Prince Harry had been introduced to the audience as Henry. The cheeky young royal's full name is Henry Charles Albert David Windsor but he nearly always goes by the nickname Harry. Mystery solved!
Nicki Minaj
Christened Onika Tanya Maraj but known to most as Nicki Minaj, the rapper has several alter egos including Roman Zolanski, who she claims is her twin brother. She has also been known to refer to herself as Nicki Teresa and Rosa. We can't keep up!
Jamie Foxx
The super-smooth actor and musician is really called Eric Bishop. And just like that, our life-long crush has fizzled and died!
Cee Lo Green
Cee Lo Green is but a stage name, if you really want his attention, you'll have to yell 'Thomas DeCarlo Callaway.'
Jude Law
Would David Law have been just as much of a Hollywood heavyweight?
'And, the Oscar goes to Dave...' Nope, a decision well made, Mr Law.
Lana Del Rey
Why be called Lizzie Grant when you can reinvent yourself as the exotic sounding Lana Del Rey?
Ricky Martin
It might seem odd that this Latino crooner changed his name from the exotic sounding Enrique Martin Morales to the more ordinary Ricky Martin, but the star made the switch due to a family fued. He was estranged from his father - also called Enrique - and couldn't bear to be known by the same monikor.
Elton John
It's well known that on the verge of stardom Reginald Dwight decided to change his name to Elton John, but did you also know that he also added in a middle name? Introducing Elton Hercules John.
Helen Mirren
The quintessentially British actress Helen Mirren was actually born 'Ilynea Lydia Mironoff', but as a Russian living in London during the Cold War, her father decided to change it to avoid getting on the wrong side of the law. Very sensible.
Carmen Electra
A wise man once told Tara Leigh Patrick to go by Carmen Electra. That wise man was Prince.
Rihanna
Robyn Rihanna Fenty wanted her fans to be able to chant a catchier name so made the move to lose her first and last names, therefore just goes by 'Rihanna'.
Miley Cyrus
This young talent was given a stage name from day one; christened Destiny Hope Cyrus, this little tot was such a happy baby that she was affectionately known as 'Smiley', which over time was shortened to 'Miley' and stuck as her stage name.
Reese Witherspoon
Lauran Jean Reese Witherspoon sacked off the her first two monikors and a star was born!
Bruce Willis
If you ever happened to get your hands on action star Bruce Willis' birth certificate you'd see that his birth name is Walter Willis.
Natalie Portman
Once Natalie hit the big time she decided to ditch her surname 'Hershlag' and use her grandmother's last name 'Portman.'
Agyness Deyn
Born and raised Laura Hollins, the supermodel decided on the new name 'Agyness Deyn' to help further her career after chatting to her mother's friend, a numerology expert, who suggested it was lucky.
Dita Von Teese
We all know the curvacious Burlesque star Dita Von Teese by her cheeky stage name, but the star's actual monikor is Heather Renée Sweet. When she embarked on her career she chose to go by the name 'Dita' to pay tribute to actress Dita Parlo while she picked 'Von Treese' was picked at random out of a phonebook but a mistake during her first Playboy shoot meant that she dropped the 'r'.
David Tennant
Doctor Who star David Tennant was forced to change his name because there was already a Scottish actor working with his actual name - David Macdonald. The star picked 'Tennant' beause he just loved to bop along to the Pet Shop Boys!
Tiger Woods
We quite humoured to find out that the golfer's real name is actually Eldrick. Tiger is just a nickname - given to him by a Vietnamese soldier his father knew - and stuck.
Ashton Kutcher
Actor Ashton Kutcher - originally called Christopher Kutcher - decided to be known as Ashton when he signed to a modelling agency and there was already a 'Christopher' working for them.