The Norwegian was assisted by Kevin De Bruyne three times in the first 40 minutes at Kenilworth Road to complete the 20th hat-trick of his club and country career, including his eighth triple since joining the Citizens – this one being his first away from the Etihad Stadium.
A close-range finish in the fourth minutes was followed by two almost identical bursting runs through on goal with two completely different finishes, the first a powerful strike under the legs of Tim Krul before delicately dinking the ball over the Hatters goalkeeper to add a third.
Jordan Clark gave Luton a glimmer of hope with two superb strikes either side of half time to reduce the deficit to one, but after meeting a wonderful long-range through-ball from Kyle Walker, De Bruyne once again teed up Haaland for net City's fourth of the night from a few yards out on the 55-minute mark.
Three minutes later, Haaland scored his fifth, receiving a pass from Bernardo Silva this time before unleashing a fierce shot that powered straight through the gloves of Krul.
Mateo Kovacic then got in on the act to with a swerving 20-yard strike to rub salt into Luton's wounds and help FA Cup holder Man City secure safe passage through to the quarter-finals.
Not only has Haaland matched his five-goal haul from a Champions League tie against RB Leipzig last season, the 23-year-old has also become the first player for a top-flight club to score at least five goals in an FA Cup game since former Manchester United man George Best netted six against Northampton Town back in 1970.
City's No.9 has
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