The 20-year-old has hit 32 goals for the Scottish side since arriving last summer
AC Milan are believed to be in talks with Celtic to sign striker Moussa Dembele, according to sources at Sky Sports.
Dembele moved to Celtic last summer on a deal worth £500,000 from Fulham.
He has scored 32 times for the side who went unbeaten this season, on the way to picking up a domestic treble.
The 20-year-old was sidelined for the last six games of the season with a hamstring injury, and missed out on Celtic's thrilling encounter with Aberdeen in the Scottish Cup final.
Milan have not won a major title since 2011, and finished in sixth place on the Serie A table this season. Having failed to make it to Europe in the last years, the club has begun a major squad overhaul under new Chinese owners.