Under the Mat: Inside Wrestling's Greatest Family is a book co-written by Diana Hart (daughter of Stu and Helen Hart, ex-wife of Davey Boy Smith and mother of Harry Smith) and journalist Kirstie McLellan. The subtitle, Inside Wrestling's Greatest Family, refers to the Canadian Hart wrestling family, which includes wrestlers such as Smith Hart, Bruce Hart, Keith Hart, Dean Hart, Bret Hart, Ross Hart, Owen Hart, Teddy Hart, David Hart Smith and Natalya Neidhart among others. The book is highly controversial and was pulled from stores after Martha Hart, widow of Owen Hart and Diana Hart's sister-in-law, filed a lawsuit. The book became an Alberta top ten nonfiction best-seller on its release.