Jennifer Aniston, 55, shows off ageless beauty as she dons glamorous plunging dress

Jennifer Aniston shared a flurry of photos of her friends, both human and dog, on Instagram Saturday.

The Friends star posted photos on the social media website with a caption made up of a red heart, a camera, and a hand-waving emoji. Her first photo was a selfie that had the actress sitting in a car with her seatbelt on, wearing a low-cut black sleeveless dress with a flower pattern.

Jennifer had her eyes wide at the camera and pouted her lips as she held two fingers against them. Her hair was down and styled to frame her face.

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Fans couldn't help but comment on how good the 55-year-old actress looked in the rare snap. "Looking sexy Jen," one wrote. Another said: "Your hair is a masterpiece – effortlessly chic, just like you. It's a constant reminder that elegance never goes out of style."

Other photos in the photo dump included two of her three dogs, Lord Chesterfield and Clyde. Jennifer also has a Pitbull named Sophie who was not included.

In one photo her dog was resting on her lap while another showed the two pups sitting in a dog house with their tongues out. Jen snuggled up to one of her dogs in another picture.

Another photo showed the 55-year-old posing after a workout with Dani Coleman, the director of training for Pvolve. In the picture, the two made faces at the camera as they wore leggings and cropped tank tops.

Jennifer showed off her friends in the post too. One picture was a FaceTime screenshot between Jen and actress Andrea Bendewald, which was taken the same day Jennifer took the ageless car selfie.

She also included photos with Molly McNearey, a TV writer and Jimmy Kimmel's wife, and Amanda Anka, the daughter of Paul Anka and Jasen Bateman's wife. One photo included was of who appeared to be a random woman with her dog trying to hail a cab in New York.

The photo dump ended up with a photo of a bathroom mirror. Jennifer wrote "I love you xx" in white marker on the mirror, a possible message to her fans. She shared another message in another photo, as the actress held up a sign that read: "I can't adult today."

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