Always a maverick, the American actor said he had been watching English football since the 1980s and predicted a "great game" between the top two.
"This is the first game that I've seen in England," Cruise revealed to Sky Sports 1.
"I've been following it since the 1980s so I'm just excited that I'm able to be here."
'Apocalypse Now' actor Robert Duvall was also at the game, but appeared to be a little rusty on the rules.
He said: "Will there be a shootout today? No? If it's a tie? No?" United won 3 2.