During a recent interview with Net-a-Porter Magazine, Martha Stewart slammed Gwyneth Paltrow and her lifestyle website GOOP, Us Magazine reports.

"She just needs to be quiet. She's a movie star," Stewart said. "If she were confident in her acting, she wouldn't be trying to be Martha Stewart."

This isn't the first time that Stewart -- who is known for her own widely successful Martha Stewart lifestyle brand -- slammed Paltrow's lifestyle brand endeavors.

Last year, Stewart took a slight jab at the actress turned lifestyle guru during an interview with Bloomberg television.

"I haven't eaten at Gwyneth's house and I don't know how she lives, but if she's authentic, all the better. I certainly hope she is," Stewart said. "She really wants to be part of the lifestyle business. She's a charming, pretty person who has a feeling for lifestyle. Fine, good. I think I started this whole category of lifestyle."

Stewart also slammed her friend, Blake Lively for starting her own lifestyle blog, Preserve.

"Let her [Blake] try," the mogul said to the Huffington Post back in July. "I mean, why would you want to be me if you could be an actress? I just did a movie yesterday, though -- I can't even tell you about it."

Stewart then softened her jab towards Lively and revealed, "I want to be Blake Lively."

She continued, "She [Blake Lively] moved into my neighborhood a couple of years ago with Ryan before they got married,. They bought a house right around the corner from my house. And they started to come over, not to borrow sugar, but just as friends."

Stewart concluded her interview by naming the celebrities who inspire her.

"It's fun to admire and to learn from people who are better at everything than you are, so I have many heroes I worship, like Derek Jeter -- I can't play baseball like Derek Jeter! And Beyonce -- I certainly can't dance and sing like Beyonce!"

Neither Lively nor Paltrow has responded to Stewart's comments.

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