The wrestler and actor Silver King has died after collapsing while performing in London yesterday.

Silver King, who was aged 51, played the villain Ramses in the film Nacho Libre, which also starred Jack Black. A household name in his native Mexico, he was performing at the Roundhouse, London in the Greatest Show of Lucha Libre when he suffered a heart attack, as reported by the Mexican news-site, Record.

The Lucha Libre organisation who had organised yesterday's event tweeted the following statement: "Lucha Libre AAA Worldwide joins the grief that the Luchistica family has for the death of César Cuauhtémoc González Barrón 'Silver King'." 

The Roundhouse issued a statement saying that the circumstances of the wrestler’s death were under investigation. "Our thoughts and condolences are with his family, friends and all of the Lucha Libre team," the venue declared..

The audience was cleared out of the building after a fall that left the wrestler unconscious, with co-performers not immediately realising that the incident was very serious, according to the Camden New Journal.

The London Ambulance Service reported that two ambulances, an advanced paramedic and an incident response officer were sent to the venue after a call came through at 10.21pm. They declared that Barrón died at the scene.

Silver King was son of legendary wrestler Dr. Wagner, who was born in 1936 and who retired in 1986, following a serious car accident which left him wheelchair-bound, although he did manage to walk with a cane later on.

He was the brother of Dr. Wagner Jr. who is also a noted wrestler.

Silver King was one of the most popular luchadores, or fighters, in the so-called Arena Mexico.