Mark William Calaway (born March 24, 1965)[6] is an American professional wrestler, better known by his ring name The Undertaker. He is signed to World Wrestling Entertainment (WWE).

Calaway began his wrestling career with World Class Championship Wrestling in 1984. He joined World Championship Wrestling (WCW) in 1989. When WCW did not renew Calaway's contract at the end of 1990, in November of that year he joined the World Wrestling Federation (WWF), which became WWE in 2002. Having remained with that company ever since, Calaway is currently one of the senior performers in WWE. He is one of only two wrestlers, the other being Shawn Michaels, to have appeared on the very first episode of Raw who are still with the company today.[7]

He is undefeated at WrestleMania with a 16-0 record and is a six-time world champion (four-time WWE Champion and two-time World Heavyweight Champion).[8][9] He was also the winner of the 2007 Royal Rumble.[10]