In the promotion's first major event since June, BKFC 63 will be headlined by women's strawweight champion Britain Hart defending her title against former flyweight title challenger Taylor Starling. As two of the biggest female bare-knuckle stars, Hart and Starling have long been on each other's radars and have developed a small rivalry on social media.The event will mark the promotion's inaugural show in Sturgis, South Dakota on Aug. 3 and will stream live on the BKFC app through BKFC+. Hart and Starling will be the lone championship fight of the night and the final of 10 fights on the card.Hart, 10-1 in BKFC, has been the promotion's second-most successful female fighter behind women's flyweight champion Christine Ferea. The 34-year-old transitioned to bare-knuckle in 2020 after realizing minimal success in MMA and gained notoriety in her second fight with a decision win over Paige VanZant.Starling has not been as successful as Hart but has the most social media followers of any female fighter in BKFC. 'The Killer Bee' owns a 5-2 record in bare-knuckle and enters her second title fight off a win over Jenny Clausius, who beat her in an MMA fight in 2019.BKFC 63 full fight cardWith Britain Hart and Taylor Starling headlining BKFC 63, the event begins at 9 p.m. ET / 1 a.m. GMT from the Legendary Sturgis Buffalo Chip in Sturgis, South Dakota on Aug. 3.View the full BKFC 63 fight card below:Main card (9 p.m. ET / 1 a.m. GMT on BKFC+)(C) Britain Hart vs. Taylor Starling, for the BKFC women's strawweight titleJosh Burns vs. Sam Shewmaker, heavyweightJosh Dyer vs. Will Albrecht, light heavyweightBryant Acheson vs. Joseph Creer, light heavyweightRobert Armas vs. Jack Grady, bantamweightJosh Watson vs. Ruben Roundstone, heavyweightMichael Larrimore vs. Derek Perez, bantamweightZach Calmus vs. Paul Shough, heavyweightDonnie Tice Jr. vs. Brandon Conley, cruiserweightGabriel Freyre vs. Timmy Mason, featherweight