There’s nothing magical about saving a pile of dough.

‘Harry Potter’ actor Rupert Grint may be a multimillionaire with a mansion in London, but he’s just like us: He loves coupons and Costco.

In fact, his eyes will light up the moment you mention the big-box retailer and its signature brand, Kirkland. Kirkland toilet paper rolls? “They last forever,” Grint told Moneyish. Kirkland clothing? “I’m actually wearing Kirkland socks now.”

Grint is the star of the upcoming series “Snatch,” which airs on Sony’s TV network, Crackle. Grint, 28, landed the role of a lifetime at the age of 11. Playing Ron Weasley — Harry Potter’s goofy, red-haired, chocolate-frog eating friend — in the “Harry Potter” franchise’s eight films earned him a fortune. But he tends not to think about the money too much. “I don’t even know the entire figure, really,” he says.

And he still likes a good deal.

 

Rupert Grint in “Snatch.”  (Crackle)

“I got quite into couponing,” he says, “there’s so many deals you can get.” He says he has watched the TV show “Extreme Couponing,” and cuts his coupons out of magazines to use in person at the supermarket checkout. He plans ahead and collects coupons to use at the right time on items such as talcum powder and car shampoo, which he says he stockpiles in his basement.

“I have hay fever, so tissues are a big, big deal,” he says. “I get a lot of good tissue deals, but it’s a very specific type that relates to the coupon. It has to be an Olbas Oil one, it’s got an Olbas Oil infusion.”

The actor says he goes to Costco weekly in London — at one point, he went daily. He upgraded his Costco membership from Business to Executive, and he always carries his black Costco card everywhere in his phone case. The other cards he carries are his bank card and his driver’s license, but “the Costco card is the main card. It’s in the window.”

He has bought furniture at Costco. He gets nearly ecstatic when he talks about the store’s baked goods, or the food court. “Oh my god, the pizza is amazing. It’s the best pizza. The hot dogs as well,” he says.

Though he doesn’t have to worry about money, Grint says the draw of couponing and Costco savings is the feeling that he’s “winning in some way, kind of like beating the system.”

Despite this, he allows himself the impulsive splurges. His latest: A new pet dog, Audrey. And all of Audrey’s swanky accoutrements.

Audrey is on an organic diet of meals such as venison and sausages of minced meat, that get delivered to the home. “Her food is more expensive than what I pay for food,” he says. (For example, he says a meal for Audrey costs about 14 pounds, whereas a hot dog at the Costco food court is 1.50 pounds — and comes with a drink.)

He also bought Audrey a DNA test from ancestry.com, to find out his dog’s genetic origins. “It’s so expensive. We haven’t done it yet. You have to swab her mouth and I haven’t seen her in ages,” he says.

The actor can be seen on “Snatch,” premiering Thursday on Crackle.