Paul Kelly is an English mixed martial arts (MMA) fighter currently signed to the Ultimate Fighting Championship. Kelly trains out of Liverpool, England at the Wolfslair MMA academy which is home to The Ultimate Fighter 3 winner Michael Bisping.

He made his UFC debut at UFC 80: Rapid Fire, where he won a decision victory over his opponent Paul Taylor. Kelly and Taylor were both awarded $35,000 as a bonus for fight of the night.

Kelly was scheduled to fight Jonathan Goulet at UFC 85. But Goulet pulled out citing a lack of preparation. Before another opponent was found. Kelly himself had to withdraw from the event after injuring his right hand during training.

Kelly was defeated by Marcus Davis via submission at UFC 89.

Kelly defeated Troy Mandaloniz at UFC 95. Kelly battered Mandaloniz from top position thoughout the fight. He opened cuts above both of Mandaloniz's eyes with elbows and punches. The judges scored the fight (30-27, 30-27, 30-28) for a unaminous decision for Kelly.