Jennifer Aniston may have gotten some cosmetic surgery procedures done on her face over the past year, a well-known facial plastic surgeon has suggested.

Just weeks after Aniston's appearance at the 2024 Critics Choice Awards sparked Botox allegations, the "Friends" alum, 55, reignited rumors that she may undergone plastic surgery after she and pal Sandra Bullock were photographed leaving a plastic surgery retreat last week, according to the Daily Mail.

Weighing in on the speculation, New York City-based plastic surgeon Dr. Gary Linkov, who has more than 835,000 followers on YouTube, claimed in a recent video that he noticed some potential changes in Aniston's current appearance compared to her face last year and speculated on what procedures she may have gotten to achieve her alleged new look.

RELATED: Jennifer Aniston, Sandra Bullock Spotted Leaving Plastic Surgery Expert's Office

Analyzing a video of Aniston posing on the 2024 Critics Choice Awards red carpet, Linkov claimed that the actress' brows "look very different."

The plastic surgeon suggested that Aniston's "lateral brow has been lifted in the past year or so, possibly with a brow lift procedure."

Linkov also said he noticed some "changes to her lower face" due to her philtrum -- the groove between the bottom of the nose and the upper lip -- "getting longer."

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Jennifer Aniston
Actress Jennifer Aniston arrives for the 30th Annual Screen Actors Guild awards at the Shrine Auditorium in Los Angeles, February 24, 2024.
(Photo : VALERIE MACON/AFP via Getty Images)

In addition, Linkov claimed that the area around Aniston's eyes, where the crow's feet are, appeared to have had some Botox injected into it.

However, the doctor said it seemed the "Murder Mystery" star's forehead did not get the treatment as she is able to move her eyebrows up.

In a video he posted in July 2022, Linkov broke down the changes he noticed in Aniston's face between 1994 and 2022.

The plastic surgeon suggested that Aniston may have started getting lip filler in her early 30s and underwent a possible "chin reduction" around 2005 when she was 36.

He cited Aniston's shortened lower face, which he said looked very different from the "prominent chin" she previously had.

Linkov also suggested that Aniston may have started getting Botox injected in her upper face and had a nose job in her late 30s.

According to his YouTube bio, Linkov is "double board-certified by the American Academy of Facial Plastic and Reconstructive Surgery and the American Board of Otolaryngology-Head & Neck Surgery."

He graduated with a psychology degree from Cornell University and got his medical degree from Columbia University's medical school, according to the website of his clinic City Facial Plastics.

He describes himself as a "facial plastics and hair restoration expert" who currently specializes in hair transplant surgery and cosmetic lip surgery for men and women.

Aniston previously admitted to undergoing rhinoplasty surgery to fix a deviated septum, describing it as the "best thing [she] ever did."

"I slept like a baby for the first time in years," the "We're the Millers" actress told People in 2007.

However, she has denied getting other procedures done on her face and body, telling the outlet at the time: "As far as all the other [rumors], as boring as it sounds, it's still mine. All of it. Still mine. ... I really am pretty happy with what God gave me."

Jennifer Aniston
Actress Jennifer Aniston arrives at the premiere of Universal Pictures' 'Wanderlust' held at Mann Village Theatre on February 16, 2012 in Westwood, California.
(Photo : Jason Merritt/Getty Images)

The "Morning Show" star also set the record straight regarding rumors that she had breast implants or a breast enhancement during a 2006 "Oprah Show" interview.

"No boob job!" Aniston said at the time. "You know what it's called? It's called 10 pounds."

During a 2014 interview with E! News, Aniston said she would not rule out getting plastic surgery but claimed she's not a fan of Botox.

"I'm never saying I would not do anything," she said at the time. "I think that it's the Botox and the filler sort of thing has got, in some faces, out of control."

She also told Yahoo Beauty later that year that she learned from the "mistakes" of her fellow stars and was "not injecting s**t into my face."