William Jonathon Dennis (born 10 July 2000) is an English professional footballer who plays as a goalkeeper for EFL League One club Leyton Orient on loan from Premier League club Bournemouth.
Dennis started his career in the academy of Luton Town before moving to join the Watford academy, where he played from under-9s up to under-16s. After being released by Watford, Dennis had trials with Milton Keynes Dons, Coventry City and Stevenage.
Dennis joined Bournemouth at the age of 15 in 2016, turning professional 18 months later and joining the first-team at the start of the 2019âÂÂ20 season. He also had spells in non-league with Guernsey and Weymouth during the 2017âÂÂ18 season.
In March 2020 he signed a new three-and-a-half-year contract with the club. Later that month he was praised by manager Eddie Howe.
On 11 December 2021, Dennis signed for Wealdstone on an emergency loan. He made his debut on the same day, in a 1âÂÂ0 defeat to Halifax On 18 December 2021, Dennis was recalled from his loan spell by parent club Bournemouth.
In January 2023, Dennis joined National League South club Slough Town on loan for the remainder of the season.
In June 2023 he signed on loan for Kilmarnock for the season.
In February 2026 he moved on loan to Leyton Orient.