Very talented......I used to be very flexible and double joined so I believe it is real. I could walk on my hands at one time, without any effort at all.
The American Ross sisters were very famous at one time for their amazing flexibility. Today if they'd been around they would have been members of Cirque de soleil..
The youngest Ross sister Dixie jewel Rose ( also known as Elmira) who died aged 34 was married to a well known British Entertainer..(Dickie Valentine)..
This footage was taken from an MGM Film Broadway Rhythm (1944)...and Elmira was just 15 years old.. all of the girls had hypermobility