The 26-year-old is understood to have completed his medical and signed his terms at Anfield, where he will join on a season-long loan with no option or obligation to buy.
Should the terms of the deal stay as they are, Arthur would return to Juventus for the 2023-24 season, as his deal with the Old Lady is not due to expire until 2025.
However, that did not stop the former Barcelona man from bidding farewell to Massimiliano Allegri's side on social media, posting "Grazie mille" which translates to "A thousand thanks".
The post was accompanied by a short video of some of his memorable moments in a Juventus shirt since his arrival in 2020 as part of a swap deal with Miralem Pjanic.
Arthur has only managed one goal and one assist in 63 appearances for the Old Lady over the past two seasons, winning one Coppa Italia and one Supercoppa Italiana crown in the process.
The Brazil international will provide midfield cover while Jordan Henderson, Alex Oxlade-Chamberlain, Thiago Alcantara and Naby Keita recover from injuries, with the former picking up a hamstring issue against Newcastle United in midweek.
Benfica 
Estrela Da Amadora 
Sparta Rotterdam 
AZ Alkmaar 
Southampton 
Liverpool 
Como 
Fiorentina 
Sevilla 
Rayo Vallecano 
Ajax 
Pec Zwolle 
Palermo 
Sampdoria 
Ipswich 
Manchester Utd 
Napoli 
Roma 
Moreirense 
FC Porto 
Leganes 
Real Madrid 
Lazio 
Bologna 
Empoli 
Udinese 
CSKA Moscow 
Rubin 
Slovan Bratislava 
AC Milan 
Sparta Praha 
Atletico Madrid 
Valencia 
Barcelona 
Stade Brestois 29 
Bayer Leverkusen 
Red Bull Salzburg 
Bayern Munich 
Paris Saint Germain 
Inter 
RB Leipzig 
Manchester City 
Feyenoord 
Sporting CP 
Arsenal 
FC Rostov 
Spartak Moscow 
Aston Villa 
Juventus 
Celtic 
Club Brugge 
Dinamo Zagreb 
Borussia Dortmund 
Monaco 
PSV 
Shakhtar Donetsk