Smith was the first of their twelve children, being one of their eight sons, Bruce, Keith, Wayne, Dean, Bret, Ross and Owen followed him.

[13][14] When he was less than a year old his mother, Helen Hart, suffered an automobile accident while pregnant with his younger brother Bruce.

[19] In 1973 Hart debuted for his father's promotion Stampede Wrestling in a tag team match with Bob Pringle against Joe Tomasso and Super Hawk in Regina.

[20] Late that year he also tag teamed with his brother Bruce against Frank Butcher and Kim Klokeid.

Hart has claimed that his time in Japan caused the breakup with his then girlfriend and mother of his first child, Marla.

[29] In the early 80s Hart worked for Stampede Wrestling where he mostly participated in singles matches against wrestlers such ad Otis Young, Bill Jodoin, T.G.

Stone and Joe Tomasso but also in a lot of tag team matches with his brother Keith against people such as Kerry Brown and the Cuban Assassin.

[31] On May 24, 2013, he returned once again to the ring at the Grange Hall arena in Lefroy, Ontario in a match for Pure Wrestling Association where he defeated Mad Braddock.

[33][34] On March 28, 2010, Hart made an appearance at Wrestlemania 26 to help his brother Bret defeat Vince McMahon in a No Holds Barred Match.

[35] Hart also appeared on WWE television at his father Stu's Hall of Fame induction together with his sibling.

[62] In 1978, Hart was attending the Oktoberfest in Germany together with Tom Billington and his brother Bruce to represent Stampede Wrestling in an international wrestling tournament, when Hart was called out he entered the ring with a Hitler mustache and performed a Nazi salute in an attempt to play a joke on the other wrestlers.

[65] Hart is one of 96 known people on an Alberta Justice website who owe a combined $6.6 million in court-ordered Maintenance Enforcement Program (MEP) payments to spouses and children.

[66] On January 21, 2016, Hart announced on his Twitter and Facebook profile that he had been diagnosed with both prostate and bone cancers.

[73] On June 5, 2017, Smith Hart announced on his Facebook page that he had entered hospice care related to his cancer.