"The big final dance number is fairly easy," said Driver. "My hope is 350 fans of the music will want to come along and let rip."
He said those coming to Friday's performance would be given song sheets and the house lights would be turned up a notch to cue entries.
"The idea is we will get 350 people in Q Theatre singing Hosanna and I Don't Know How to Love Him."
He said the 30 cast members were excited at the prospect of having their ranks swell 10-fold.
And Driver said it wouldn't be hard to incorporate the audience without the need to leave their seats.
The Superstar stage was set up on different levels of the theatre to look like a mini colosseum that surrounded the audience.
The musical, written by Tim Rice and Andrew Lloyd Weber, is loosely based on the Bible's account of the last week in the life of Jesus, beginning with his arrival into Jerusalem and ending with his crucifixion.
The Auckland production has been such a box office sensation that the season has been extended three times. It will close on December 20.