India, July 12 -- You might just be under the misconception that you know everything about your favorite celebrity. But several popular stars had changed their big names into shorter ones or hid their old name to create a new identity before rising to fame in Hollywood. Wondering if your favorite celebrity is on the list? From John Legend to Katy Perry, here is a list of 10 celebrities you didn't know had a different name before making their debut in the entertainment industry, according to People.

John Legend has made the world fall in love with his tunes. But only a few people know that he was born as John Roger Stephens. He got the nickname 'Legend' from the iconic sitcom, Friends.

The handsome Hollywood actor was earlier referred to...