DOMESTIC DIVA DUST-UP

PRIM and proper Martha Stewart is publicly saying polite things about the Duchess of Sussex's latest lifestyle company.

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But sources dish the domestic diva is no fan of Prince Harry's wife, Meghan ― and can't wait to celebrate the kitchen copycat's downfall! Meghan, 42, recently unveiled her new personal brand American Riviera Orchard, and tipsters tattle the former Suits actress plans to peddle crockery, serving ware, table linens and dog food to coincide with a cooking show.

"Martha has seen hundreds of Meghan types come and go and says they all come in with the same self-inflated hype, only to find out it's a whole new ball game when it comes down to brass tacks," hisses an insider.

"She's tired of being quizzed by people over how she feels about Meghan's venture because, honestly, it's irritating and insulting to her that she's being compared to a rookie!" As National ENQUIRER readers know, this isn't the first time catty Stewart's claws have come out against a competitor.

The reigning homemaking queen has taken savage swipes at Goop guru Gwyneth Paltrow! Martha, 82, accused the Oscar winner, 51, of trying to mimic her and huffed, "She just needs to be quiet. She's a movie star.