Diana Hart is an American author and former professional wrestling personality, best known for her work in the wrestling industry. She is a member of the famous Hart family, which has produced several notable wrestlers, including her brother, Bret Hart, and her father, Stu Hart. Diana has contributed to the wrestling world through her writing and involvement in various wrestling promotions. In addition to her wrestling background, Diana Hart has written books that provide insights into the lives of wrestlers and the wrestling business. Her most notable work is the biography titled "Under the Mat," which details her experiences growing up in the Hart family and the challenges faced by professional wrestlers.