After casting Zack Morris, the next character sought after was Morris's nerdy friend, Samuel "Screech" Powers. Gosselaar was asked to read through the script with a number of kids, and a second audition was scheduled for finalists. It was Gosselaar himself who insisted that Dustin Diamond was right for the part as he believed Diamond was Screech in real life. After reading through the script, Diamond was given the part, although Engel later found out that he had misread his head shot and Diamond was considerably younger than the rest of the cast—a fact that, had he been aware, might have prevented Engel from casting him.