NEW YORK (CBSNewYork) — Marriage is going to the dogs tonight.

A wealthy animal rights activist is breaking the Guinness World Record for the most expensive animal wedding.

The event Thursday night at the Jumeirah Essex House on Central Park South is valued at $250,000.

Vendors are donating their services to the black tie event which benefits the Humane Society of New York.

That includes a $6,000 wedding dress for the tiny Coton de Tulear custom-made by Kleinfeld, a seven-piece orchestra for $15,000 and a $5,000 sushi spread.

Opera singer Nathan Pacheco and jazz trumpeter Dominic Farinacci are expected to perform at the event.

The wedding is being thrown by pet expert and TV personality Wendy Diamond.

Her adopted rescue dog, Baby Hope, will tie the knot with Chilly Pasternak, a Virginia poodle, in an arranged marriage.

“It’s going to be a celebration for animals that truly will be remembered for the rest of history,” Diamond said.

About 250 humans and 50 dogs, including Triumph, the Insult Comic Dog, are expected to attend the wedding.

“Baby Hope is beyond excited,” Diamond said. “Well, actually, Baby Hope probably doesn’t even know what’s going to happen tonight, but I’m sure if she knew that she was going to raise $50,000 for the Humane Society of New York and for fellow dogs that need to be adopted, I think she’d be absolutely enthused.”

Diamond has raised thousands for charity since 1999 and has led campaigns to stop shelters from euthanizing pets.

Baby Hope will walk down the aisle in place of Lucky, a Maltese who was the inspiration for Diamond’s company “Animal Fair.”

Lucky was diagnosed with cancer earlier this year and was supposed to have an extravagant wedding to celebrate her life.

Lucky passed away in June from cancer.

Would you ever throw a wedding for your pet? Let us know below…

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