Bio exerpt from Bruce Campbell's Official Site.

I am the youngest of three brothers (Mike and Don) and I was born in Royal Oak, Michigan at the same hospital as my pal Sam Raimi on June 22nd in the year of the Edsel (you do the math). I'd call my childhood "normal" in that I grew up in the suburbs, watched "Lost In Space" on TV, dug tunnels in my back yard and ran around dressed as Zorro. Are you starting to get the idea?
      That nasty acting "bug" took a bite out of me when I was 8 - I saw how much fun my dad was having performing in local community theater and decided I wanted in on the action.
      My first official acting job occurred at age 14 when the actor who was to play the young prince in The "King and I" became ill and I stepped into the role. I even had to sing -- now there's something you don't see every day...
      I went on to appear in several Community theater productions, including "South Pacific" and "Fiorello," then was directed by my dad as "Chance Wayne" in Tennessee Williams' "Sweet Bird of Youth."
      Somewhere along the way, I started to experiment with this "filmmaking" thing, doing cheezeball super-8 flicks with a neighborhood pal of mine.
      I then met future big shot director Sam Raimi in a high school drama class in 1975. See, Sam did a lame-o pantomime in class, and I followed it with an equally lame-o one - we consoled each other and became fast friends. Soon, along with Sam and a bunch of other high school knuckleheads, we began making heaps of super-8 movies - about 50 or so.
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Bio from Bruce Campbell's Official site.