Loan move: Villa bring in Ilori
The 22-year-old put pen to paper on the contract in the final moments of deadline day.
The former Sporting Lisbon defender - who can play anywhere across the backline - has enjoyed loan spells at Spanish La Liga side Granada and French Ligue One outfit Bordeaux over the past two seasons.
Born in London, Ilori has represented Portugal at U18, U19, U20 and U21 level.
Boss Tim Sherwood said: "I am very pleased to bring Tiago into the football club.
"He's someone I have been aware of for some time and I am looking forward to working with him.
"He's a young guy who I believe will enhance the group here."