The Suits actress and soon-to-be Royal was actually born Rachel Meghan Markle, meaning she's actually a 'Rachel' in real life, as well as on TV.
Pretty Little Liars fans might be aware that Shay's real name is Shannon, but did you know the reason behind her name change? It actually involves J-Lo.
"I love J.Lo, Jennifer Lopez," Mitchell told Glamour. "And when I was in high school, people would be like, 'Shay-Lo,' and then 'Shay' kinda stuck. We dropped 'Lo,' because no one can be J.Lo."
"When I was auditioning, I would go into rooms, and because it was a unique name, they'd ask me about it," she continued. "So that would get me another minute in the room, which is always great."
Well, there you go!
Like many other stars in the spotlight, Pippa adopted her nickname when she made her public debut. The socialite was actually born Philippa Charlotte Middleton, meaning she's also quite possibly the inspiration for her nieces name, Princess Charlotte. Cute, right?
Gigi & Bella Hadid
The Hadid sisters adopted their childhood nicknames when they entered the modelling industry, though they were actually born Jelena Noura Hadid and Isabella Khair Hadid.
Miley was named 'Destiny Hope Cyrus' by her parents, but was nicknamed 'Smiley' as a young child due to her happy demeanor. The singer dropped the 'S' and became Miley sometime later.
He was born Eric Marlon Bishop, but changed his name when he first started out in comedy. When he started performing at open mic nights in 1989, female comedians were called to the stage ahead of the male comics, so he chose 'Jamie' because of its gender ambiguity. 'Foxx' paid tribute to his favourite comic, Sanford And Son star Redd Foxx.
Katheryn Elizabeth Hudson didn't want to be mistaken for actress Kate Hudson, so she became the Katy Perry we all know and love today.
The actress adopted her new surname after starring in an Oscar Wilde play in high school, changing her name from the original Olivia Jane Cockburn.
The famous singer made an entirely new name for himself, after being born Reginald Kenneth Dwight.
The actress shortened her Bulgarian name Nikolina Konstantinova Dobreva to be 'Nina Dobrev' when she began acting.
Lana Del Rey
She was born Elizabeth Woolridge Grant, saying of her decision to change her name: "I wanted a name I could shape the music towards. Lana Del Rey reminded us of the glamour of the seaside. It sounded gorgeous coming off the tip of the tongue."