New Delhi, Dec. 15 -- John Cena, a record-setting 17-time world champion, has officially retired from World Wrestling Entertainment (WWE), closing the curtain on a professional wrestling career that spanned nearly two decades.

Widely regarded as one of WWE's biggest and most influential superstars, Cena became the face of the company for years, headlining countless marquee events and winning over fans across generations.

The pro wrestling business has grown into a billion-dollar industry, with many people involved in it building extremely wealthy and luxurious lifestyles through their careers.

Some of the biggest names in professional wrestling have gone far beyond the ring, using their fame to build successful careers in movies, telev...