Danielle Kelly (born December 4, 1995) is an American submission grappler and Brazilian jiu-jitsu black belt who was the inaugural and former ONE Champion at atomweight, after she was defeated by fellow BJJ practitioner Mayssa Bastos.
[3][4] Kelly fought Cathryn Millares in the co-main event of Fury Pro Grappling 2 on October 29, 2021 and won the match by unanimous decision.
[7] Kelly made her debut for Who's Number One on February 26, 2021 at WNO: Craig Jones v Ronaldo Junior, where she lost a unanimous decision to Jessa Khan.
[19] Kelly faced Jessa Khan in a rematch for the inaugural ONE Women's Atomweight Submission Grappling World Championship on September 30, 2023 at ONE Fight Night 14.
[23] Kelly challenged Mayssa Bastos for her ONE Women's Atomweight Submission Grappling World Title in a rematch on December 6, 2024 at ONE Fight Night 26.
[25] Kelly fought UFC veteran Roxanne Modafferi in the main event of Submission Hunter Pro 60 on October 25, 2020, submitting her with a toehold.