Munn, 34, said at the time, she didn't even know about it, reported Us magazine.
"I've always wanted to be an actress since I was a little girl, since I was watching Punky Brewster. When I found out she was an actress, that's what I wanted to do," she said.
'Punky Brewster' was an American sitcom about a girl playing the titular role.
And with nothing more than hope and a handy guide to launching an acting career, Munn, said she set out on a long journey to make her dreams come true.
'The Newsroom' actress is excited about her new endeavour of being an author.
"I wanted to write a collection of short stories about my life. I wrote it in a way that if my 13-year-old self could write a letter to me now, and I correspond back to her," she added.