Will Grigg scored the opening two goals as MK Dons secured passage to the Third Round of the Capital One Cup after one of the biggest upsets in the competitions history.
The Sky Bet League One side beat 20 times Premier League Champions Manchester United 4-0 at Stadium:MK in front of a sell-out crowd.
The Brentford man put The Dons ahead midway through the first-half capitalising on a defensive slip up to sweep home from 15 yards.
He made it two just after the hour as he improvised brilliantly to chest home Ben Reeves wicked cross.
Will was withdrawn five minutes later to be replaced by Arsenal loanee Benik Afobe who secured the emphatic win by netting The Dons third and fourth goals late on.
The reward for the win is a home tie against Capital One Cup finalists from 2013 Bradford City.
Will was the only Bees in action this midweek and he will be hoping to be involved on Saturday when The Dons return to league action at home to Crawley Town.
Fellow Brentford players Alfie Mawson and Josh Clarke are on loan in Sky Bet League Two at Wycombe Wanderers and Dagenham & Redbridge preparing for a trip to York City and a home game against Oxford City respectively.
Mark Smith is also out on loan at Hitchin Town in the Calor Gas Southern Premier League and he will be hoping to be involved as Town host Cirencester Town on Saturday.