Warren O'Hora has made a permanent move to MK Dons from Brighton and Hove Albion after a highly successful loan spell at the League One side.
The 21-year-old Republic of Ireland underage international has spent the first half of this campaign with the Dons, making 17 appearances and really shining at centre-half.
The Dubliner moved to the Seagulls from Bohemians in January 2018, and although he did well for the Premier League club's under-23s, he couldn't break into the first team.
However, the move to MK Dons has accelerated O'Hora's development, and he will look to help his team - currently 16th - climb the table in the second half of the season.
"I'm over the moon," O’Hora told mkdons.com. "I’ve enjoyed my time with the club ever since I arrived back in pre-season, so I’m happy to be here on a permanent basis.
"Every footballer wants to keep improving and developing, and I think MK Dons is the best place for me to do that. It’s a big ambition of mine to keep moving forward and I know I can do that with this club. I’m really excited for the future."
Boss Russell Martin said O'Hora had "earned this contract".
"It's brilliant news for the football club - in both the short term and the long term.
"He’s been one of our best players this season and certainly earned this contract. The challenge for him now is to establish himself as a top player at this level.
"He has also real leadership qualities which, now he’s our player, we hope to see come through even more too."