At Saturday's NFL Experience event, the Patriots tight end was on stage talking football when fans started chanting "Spike the mike! Spike the mike!" and naturally Gronk obliged by slamming the mike on the stage.
And famously stoic head coach Bill Belichick laughed.
Also during the fan rally at Trafalgar Square, Patriots quarterback Tom Brady was heckled by a rambunctious fan when he spoke on the big stage. The shout of "Brady, you suck!" caught the star QB attention. "I've heard worse," Brady replied. "Trust me, I've heard worse."
Patriots owner Robert Kraft, wide receivers Wes Welker and Brandon Lloyd, and punter Zoltan Mesko also addressed the large crowd at the NFL promotional event.
In addition, we caught up with sports fans from about 10 different countries who shared their thoughts on soccer vs. American football.
On the weather front, it's a cold and chilly day in London for today's Patriots-Rams game with temperatures expected to be in the 40s by game time.