If the Giants need a new kicker, they might want to try out Kate Mara’s ex.

The Hollywood starlet, appearing on Tuesday night’s episode of “Conan,” related the time her former boyfriend fumbled the Lombardi Trophy at her family home — the Maras own the Giants — and put a boot’s worth of damage into the heralded hardware.

“I was dating someone a long time ago who came to visit my parents not too long after the Giants won the Super Bowl, and a trophy had just arrived,” Mara said. “My parents, my mom specifically, was very excited about this. And she said, ‘Would you like to see it? Would you like to hold it? They’ve sent white gloves that you put on before you can hold the trophy.’

“He was a very enthusiastic man and he put on the gloves and then he went to lift up the trophy, but he lifted it up from the base, which we didn’t know wasn’t connected to the trophy, and it fell. … He was wearing these steel-toed boots, he was a pretty good soccer player and he kicked his foot up and caught the trophy with his boot and then caught it in his hands.

“And he dented, just a tiny part.”

So who is the lucky lover turned accidental kicker? There are two viable suspects, though we know it came soon after a Giants championship and the suitor was English: Mara was linked to “Daredevil” star Charlie Cox in 2008, soon after Big Blue’s first title of recent vintage, and was dating actor Max Minghella when they triumphed again after the 2011 season.

The “House of Cards” ingenue is currently dating English actor Jamie Bell — can’t say she doesn’t have a type — of “Billy Elliot” and “Fantastic Four” fame.

Mara actually is football royalty two times over: Her mother comes from the Rooney family that owns the Steelers (hence sister Rooney Mara’s stage name). The two blue-blood franchises square off this Sunday in Pittsburgh, a once-every-four-years occurrence.

“The good news is we always win,” Mara said. “Someone’s always happy.”