United Kingdom, June 2 -- Bethenny Frankel has hit back at trolls following her Sports Illustrated Swim runway walk, as she admitted her "jelly" butt is down to the fact she never works out.

The reality TV star was just one of the famous faces who strutted her stuff on the catwalk, alongside Lizzo, Maura Higgins and Alix Earle.

She reflected on the experience afterwards in a video on her Instagram page, as she said she was determined to ignore haters who criticised her for taking part in the runway because she's 55 years old.

In a video on her Instagram page after the event, Bethenny reflected on the experience, as she said: "There's mixed like, 'Why are you doing this?. Your a** is Jell-O'," Bethenny said, hitting back: "It is Jell-O,...