There's nothing particularly outlandish about the name 'Julianne Moore', and it seems like the kind of name you might encounter from anybody you meet in the street. Therefore, it's quite surprising when you find out it's a pseudonym, but it is. This Oscar winner and Hollywood mainstay is actually Julie Anne Smith. As we said at the start of the article, there's never been a famous John Smith, so it's probably fair to say there would never be a famous Julie Smith either.
The reason for the change wasn't because she found the name dull, though. There were already actresses working under the names Julie Smith and Julie Anne Smith when Moore started her career, so she took her father's middle name in place of Smith, pushed her first two names together, and became someone new.