The 21-year-old has signed an initial short-term deal with Karl Robinson’s side, and he will stay at stadiummk until late October.
And the Dons boss is delighted to have Forster-Caskey on board, given his impressive experience for club and country.
Forster-Caskey in action against Italy at the Euro Finals in the summer
"Jake will bring tremendous footballing ability to the group – he’s a very talented individual,” Robinson told MK Dons PlayerHD.
"To have played for England at all youth levels and plenty of times in the Championship, it shows what a quality player he is.
"I saw him when he came on for Dele [Alli] in the U21s recently and he’s someone I’ve got tremendous respect for.
"Keith Andrews [Dons coach] and Matt Upson [Dons player] played with him at Brighton so we weren’t going in blind, plus he’s got Championship experience and came within our wage structure."
Forster-Caskey has been a regular in Gareth Southgate’s squad over the past 16-months, as the U21s reached the Euro Finals in Czech Republic.
He was involved again as the Three Lions made a winning start to the new campaign with victories over USA and Norway earlier in September.
Tickets for the game are on sale now, priced at £10 for adults and £5 for concessions, via ricoharena.com or by calling 024 7678 6411.
