It's a terrific result for our youngsters, with the Tannadice youth set-up so highly rated these days.
Ryan Ferguson gave United the lead before Anton Brady equalised, only for Willie Robertson to put the Arabs in front again from the penalty spot.
But in the second half Saints started to score for fun, Bradley Coyne scoring a double and Mark Lamont and Jon Scullion also getting in on the act to complete a terrific afternoon.
Story source: The Official St. Mirren Website
Follow Mirren Mad on Facebook at http://www.facebook.com/pages/Mirren-Mad/177833938918587
Follow Mirren Mad on Twitter @mirren_mad or http://www.twitter.com/mirren_mad