She captioned the video: “Last of the September sun #Hertfordshire.”
In the upload, Liz showed off her toned figure from all angles, leaving little to the imagination.
She started off on her back and rolled over to her front, pouting and smiling to the camera.
She was filmed wearing a bright string two-piece, showing off her toned physique.
The video, posted less than 14 hours ago, has already received over 500,000 views.
Fans could not get over how amazing Elizabeth looked for her age.
One said: “56 years old… and you look like you’re 26.”
Another commented: “How? How do you look exactly the same as you did in the first Austin Powers movie?