It will be announced in the Hollywood trade paperslater this week that he has signed on to guest star in at least six episodes.
The Colorado native has been acting for years. His first big break came in the motion picture "Rebound" with Martin Lawrence.
The 18-year-old has also appeared in a number of national commercials and was last seen on the big screen in a cameoin "Blades of Glory" starring Will Ferrell.
Parker will play the character of "Harold Zelinsky" described as a 19 year old genius who is a new intern at the "ER"
