Martha Stewart celebrates her 85th birthday soaking in a hot tub in Maine

Martha Stewart isn’t planning to go under the knife — or settle down with an older partner.

The lifestyle icon is embracing turning 85 on her own terms, opening up about plastic surgery, dating and aging in a new interview as she celebrated the milestone birthday.

Stewart doubled down on her long-held approach to aging naturally, revealing she has never undergone plastic surgery despite decades in the public eye.

JANE SEYMOUR, 75, SHARES HOW SHE APPROACHES AGING WITH VITALITY: ‘BEST I CAN BE’

“I have not had any plastic surgery at all. I don’t think I need it,” Stewart told People magazine.

Instead, Stewart said she relies on consistent skincare, facial treatments and healthy habits to maintain her appearance.

“I use a little bit of fillers,” she explained. “I go maybe once every four months for touch-ups.”

She added, “I’m more a maintenance kind of person. I’m not getting boobs done and hips and butts and stuff like that.”

LIKE WHAT YOU’RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWS

Stewart also opened up about her outlook on relationships later in life, saying companionship has become less important as she’s gotten older.

“Now it’s less important,” she said when asked whether she still envies friends with happy marriages. “The older you get, the less you really need a mate, I think.”

She added, “I wouldn’t want to be beleaguered with an older, ill person.”

Stewart also marked her 85th birthday by sharing a photo of herself relaxing in a bubbling hot tub during a stay in Maine.

She appeared to be unwinding at her sprawling Maine estate, where she soaked in the steaming water while wearing a black swimsuit. Evergreen trees surrounded the tranquil setting, with a sprawling pool stretching out behind the hot tub.

‘KNOTS LANDING’ STAR DONNA MILLS SAYS SHE WON’T ‘BE QUIET’ AFTER CRITIC TARGETED HER MAKEUP AT AGE 85

“I am going to use this amazing hot tub every single day I am in maine,” Stewart wrote alongside the photo. “Invigorating restorative Therapeutic relaxing.”

Fans quickly flooded the comments with compliments, with one writing, “Damn serving face too,” while another added, “Martha you are everything truly.”

The birthday milestone comes as Stewart continues embracing getting older on her own terms.

“I don’t think about age,” she told People. “Eighty-five is just a number; that’s all I consider it. I don’t want to have a party. It’s not a big deal.”

“My goal is to keep learning about everything.”

Stewart credited much of her youthful appearance to the lifestyle she has maintained for decades.

“I have good genes. My mom looked great at 95,” she said. “We eat well. We don’t drink very much. We don’t smoke. We eat healthy food. We exercise daily. I horseback-ride.”

Stewart’s disciplined routine extends well beyond her diet. She told People she still wakes at 3 a.m. every morning to complete her daily puzzles before starting her day.

Turning 85 hasn’t slowed Stewart down.

The lifestyle entrepreneur recently recreated her 1995 People cover at her 156-acre Bedford, New York, farm, where she reflected on the career that made her the country’s best-known homemaking authority.

ROSIE O’DONNELL WALKED AWAY AT THE HEIGHT OF HER SUCCESS AFTER REACHING ONE JAW-DROPPING FINANCIAL MILESTONE

“I still am a perfectionist. I still like to do many things at the same time. I like to do all the same things I’ve pretty much always done,” Stewart said. “I’d like to have a little bit more free time. I don’t have any free time at all—but I’m working on that.”

Raised in Nutley, New Jersey, Stewart began modeling before launching a catering business and publishing her first cookbook, Entertaining, helping build an empire that expanded into magazines, television, retail partnerships and home products. She became the first self-made female billionaire in the United States in 1999.

She has since authored more than 100 cookbooks, opened restaurants, became the oldest Sports Illustrated Swimsuit cover model at age 81 and continues adding new ventures to her résumé, including her home intelligence app Hint, a skincare line and multiple brand partnerships.

Asked whether she already has everything she wants, Stewart pointed to her newest venture.

“No, I don’t. I didn’t have an app for my home, and so I’m making one,” she said.

CLICK HERE TO DOWNLOAD THE FOX NEWS APP