The attacking full-back has left the Bianconeri for the remainder of the campaign and will join the Grifone who are hoping to avoid relegation
The Bianconeri confirmed on their official website that the Turin club's youth product would spend the remainder of 2013-14 campaign in Liguria.
De Ceglie, who played for Italy at Under-21 and Olympic level but never for the senior team, has made only four appearances in Serie A this season despite staying injury-free.
"Today I am happy to start this new adventure at Genoa," the 27-year-old wrote on his Twitter account. "Thanks to the fans of Juventus who have always supported me."
The wing-back was first-choice for much of Antonio Conte's first season at Juve in 2011-12, but fell backwards in the pecking order in the following campaign and has failed to make a comeback into the first team.
De Ceglie goes to the Stadio Luigi Ferraris with the Grifone sitting fourth from bottom in Serie A.
He is expected to train with Gian Piero Gasperini's squad on Saturday with a view to being part of the matchday squad when Genoa face Inter on Sunday.