Nadia Comaneci is crossing her fingers she can avoid "stumbles or mishaps" when she performs during the Tumble final.

The Olympic gold medal-winning gymnast will take to the floor with the other judges of the BBC One show for a special performance during the finale.

She told What's On TV: "I haven't performed gymnastics for about 24 years, and I'll be alongside Louis (Smith) who's still competing, and the other judges and the 10 pro gymnasts, so I hope it goes well for me.

"Hopefully there'll be no stumbles or mishaps!

"I still work out a lot and consider myself in good shape, but there's a difference between that and being what I call 'gymnastics fit'."

Bobby Lockwood, Ian 'H' Watkins, Sarah Harding, Carl Froch, Amelle Berrabah and Lucy Mecklenburgh will be battling it out to be crowned champion in the final.

Nadia, 52, said she is hoping to see the competitors challenge themselves when they take on a routine that combines a floor exercise with the double trapeze.

She said of the trapeze: "It takes a lot of courage to fly through the air like that and trust someone to catch you. I've never tried the trapeze myself! Although it's a circus-style event it has a lot of gymnastic elements, but the timing you need for the catching and the swinging is very different from usual gymnastics routines.

"The final is going to be very entertaining."

The Tumble final is on Saturday September 13 on BBC One.