The move is being completed as a loan with an option to buy in favour of the English club, according to TuttoMercatoWeb, who captured images of Di Gregorio's departure.
The 28-year-old becomes surplus to requirements in Turin following the signing of Guglielmo Vicario earlier in the window, leaving Di Gregorio without a clear path to regular football after two seasons that fell short of expectations.
Di Gregorio joined Juventus in 2024 and was earmarked as the club's long-term successor to Wojciech Szczęsny, but neither campaign fully convinced the Old Lady's hierarchy, opening the door for Vicario's arrival and accelerating the Italian's own search for an exit.
A move to Bournemouth offers Di Gregorio the chance to rebuild his career with regular first-team football in England, in a Premier League environment that has increasingly become a destination for Italian goalkeepers seeking a fresh start.
For Juventus, the departure clears space in the goalkeeping department and reduces the wage bill, with Vicario now installed as Luciano Spalletti's clear first choice between the posts following his summer arrival.
The loan structure, carrying an option rather than an obligation to buy, allows Bournemouth to assess Di Gregorio over the course of the season before committing to a permanent transfer.