{{Infobox professional wrestler |name=Nikolai Volkoff |birthname=Josip Hrvoje Peruzović |image=WrestleMania 31 Axxess 2015-03-28 11-05-11 ILCE-6000 DSC04678 (17232263810).jpg |caption=Volkoff in 2015 |names=Nikolai VolkoffBepo MongolBoris BreznikoffExecutioner #3 |height =6 ft 4 in |weight =313 lb |birth_date=October 14, 1947 |birth_place=Split, PR Croatia, FPR Yugoslavia |children = 2 |death_date= July 29, 2018 (aged 70) |death_place= Glen Arm, Maryland, U.S. |billed=Moscow, RussiaSoviet UnionMongolia |trainer=Stu HartNewton Tattrie |debut=1967 |retired= |image_size=150px}}

Stewart Edward Hart was a Canadian amateur and professional wrestler, wrestling booker, promoter, coach, trainer, football player and sailor. He is best known for founding and handling Stampede Wrestling, a professional wrestling promotion based in Calgary, Alberta, teaching many individuals at its associated wrestling school "The Dungeon" and establishing a professional wrestling dynasty consisting of his relatives and close trainees. As the patriarch of the Hart wrestling family, Hart is the ancestor of many wrestlers, most notably being the father of Bret and Owen Hart as well as the grandfather of Natalya Neidhart, Teddy Hart and David Hart Smith.