The 22-year-old made 146 appearances for the French side after his debut in 2011 and is a France youth international, having represented his country at under-18 to under-21 levels, including winning the Under-20 World Cup in 2013.
He becomes the fourth player to sign for the Villans from Ligue 1 this summer, following the arrivals of Jordan Amavi, Idrissa Gueye and Jordan Ayew, all of whom are expected to play a key role in the upcoming season.
Following Jordan Veretout's move to the Premier League, here are a few stats...
72 - The 22-year-old fashioned an impressive 72 key passes for Nantes last term, making him the club's most creative player. The same tally would have made him the most innovative player at Villa Park, with Fabian Delph his closest competitor (36).
60 - The Frenchman completed 60% of his attempted dribbles throughout the season, averaging 1.2 take ons per appearance; the second highest total at Nantes.
80 - Veretout averaged an 80% pass completion rate last term, which is marginally superior to the squad average at Villa Park (79%).
7 - With seven goals to his name, the 22-year-old finished the season as Nantes' top goalscorer, while he found the back of the net on more occasions than everyone but Christian Benteke (13) at Villa.
738 - Veretout recorded more assists (6) and made more forward passes (738) than any Nantes player last season. No player at Villa Park managed as many assists, with Leandro Bacuna finishing the campaign closest (5).