The Serie A giants confirmed on Monday that Wales worldwide Ramsey had signed a four-year agreement ahead of joining in the summer when his current deal with Arsenal expires.
The statement issued by the Bianconeri on the club's website to confirm Ramsey's signing read: "Juventus Football Club S.p.A. announces that a contract of employment with the player Aaron James Ramsey, effective as of 1st July 2019 and expiring on 30 June 2023, has been signed".
"Aaron's made a fantastic contribution to our club since joining from Cardiff City in 2008".
Juventus said that the club are liable to pay 3.7 million euros ($4.1 million) by July 10 in the absence of a transfer fee.
Juventus are considered to be experts at exploiting the free transfer market, and have signed the likes of Dani Alves, Emre Can, Andrea Pirlo and Paul Pogba on pre-contract deals in recent years.
The deal will make him Juve's second-highest earner behind Cristiano Ronaldo, who earns £500,000 a week.
The 28-year-old joined the Gunners from Cardiff City 11 years ago, going on to win the FA Cup three times under former boss Arsene Wenger.
"We look forward to Aaron helping the team to a strong end to this season before he joins Juventus in the summer".
"It is with a heavy heart that I leave after 11 incredible years in north London".
'I will continue to give the team 100 per cent and hope to finish the season strongly before heading to my next chapter in Turin'.