Mizanin first gained fame as a reality television participant.

He was a cast member on MTV's The Real World: Back to New York in 2001 and subsequently appeared in its spinoff series, Real World/Road Rules Challenge from 2002 to 2005, where he reached the finals in The Gauntlet and The Inferno, while winning Battle of the Seasons and The Inferno II.

announcing the planned card at the top of the show and attempting to hype up the crowd.

Other "host" duties included backstage interviews and hosting a bikini contest.

When Mizanin actually attempted to make his debut on the April 21, 2006 episode of Smack Down!

, however, he was, in storyline banned from entering the arena by "network executive" Palmer Cannon who told him that he had been "cancelled" before having security escort him from the premises.

He has also come to star in several films produced by WWE Studios, portraying Jake Carter in The Marine 3: Homefront, The Marine 4: Moving Target and The Marine 5: Battleground, as well as starring in Christmas Bounty and Santa's Little Helper.

After being trained at Deep South Wrestling and Ohio Valley Wrestling, he was promoted to the main roster in 2006.

In 2013, Miz along with Francia Raisa were in a movie together called Christmas Bounty.

Pursuing the goal of becoming a professional wrestler, Mizanin joined Ultimate Pro Wrestling (UPW), where he trained in the Ultimate University.

and as a heel, starting his in-ring competition with win over Tatanka in the September 2006 episode of Smack Down! After this win he, along with commentator Michael Cole, began to note whenever possible that he was "undefeated", though he only wrestled five matches over the next two months, defeating such wrestlers as Matt Hardy, Snitsky easily defeated The Miz to give ECW the draft pick, but after constantly assaulting The Miz after the match, the referee reversed the decision and awarded the match to Miz, thus allowing Smack Down! On the November 16 episode of Smack Down, he became one half of the WWE Tag Team Champions with John Morrison when they defeated Matt Hardy and Montel Vontavious Porter (MVP) in a title match, which gave The Miz his first title within the company.