Nom nom nom nom nom.

That's the sound of an estimated 500 East End feral cats chowing down, thanks to Oscar winner Julianne Moore and the largesse of three organizations that help homeless animals.

Moore, who won this year's best actress award for "Still Alice," was given the chance to designate a recipient for 2,500 pounds of pet food -- and she chose Animal Rescue Fund of the Hamptons, or ARF.

Oscar nominees received gift certificates from Halo, Purely for Pets -- co-owned by Ellen DeGeneres -- for 10,000 meals of natural food, to be donated to shelters or rescues of the performer's choice, according to ARF, which was notified of the gift in early September.

The cases of kibble, valued at $5,100, arrived early last month, the organization said. The gift was made possible through a partnership of Halo, GreaterGood.org and FreeKibble.com, with an eye toward helping "alleviate the burden of feeding homeless animals," according to ARF.

"We were thrilled to be chosen," said Michele Forrester, ARF's senior director of operations and partnership programs. "Every donation helps toward the bottom line of our budget."

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The kibble is going to about 20 volunteers who "care for the large colonies of these community cats -- ensuring their survival and health, especially in the harsh winter months," ARF said.

The hope had been that the food would take them through the end of the year, but now it's looking like "it will come up just a bit short," said ARF spokeswoman Jamie Berger.

The volunteers are part of the organization's Operation Cat Program, a feral cat trapping, neutering and release initiative that covers an area from Brookhaven Town to Montauk.

With Thanksgiving nearing, ARF is also seeking donations of food, blankets, towels, toys and other items on behalf of local food pantries. To learn more, visit arfhamptons.org/giving-opportunities/wishlist.