James Henry Neidhart was an American professional wrestler known for his appearances in the 1980s and 1990s in the World Wrestling Federation as Jim "the Anvil" Neidhart, where he was a two-time WWF Tag Team Champion with his real-life brother-in-law Bret Hart in the Hart Foundation. He also won titles in Stampede Wrestling, Championship Wrestling from Florida, Mid-South Wrestling, Memphis Championship Wrestling and the Mid-Eastern Wrestling Federation. He was part of the Hart wrestling family through marriage to his wife Ellie Hart, teaming with various members throughout his career, and appearing with his daughter Natalya Neidhart on the reality television show Total Divas.

The Hart wrestling family, sometimes known as the Hart dynasty, is a mainly Canadian family with a significant history within professional wrestling. The patriarch of the family was wrestling legend Stu Hart (1915–2003). An amateur and professional wrestling performer, promoter and trainer, Stu owned and operated his own wrestling promotion, Stampede Wrestling. He also trained some of the most well known stars in wrestling history including "Superstar" Billy Graham, Fritz Von Erich, Chris Jericho, Chris Benoit, and his own sons Bret Hart and Owen Hart.