(CNN) -- Aston Villa have bolstered their defense with the signing of England internationals Nicky Shorey from Reading and Middlesbrough defender Luke Young.
Nicky Shorey will fill the left-back position at Aston Villa following the injury to Wilfred Bouma.
Left-back Shorey joins former Reading team-mate Steve Sidwell, Young and American goalkeepers Brad Friedel and Brad Guzan as summer signings for the Premier League club.
Both Shorey and Young headed to the Midlands on Thursday after Villa agreed fees with Reading and Middlesbrough and -- after agreeing personal terms --the twice-capped international Shorey signed for Martin O'Neill's side for an undisclosed fee.
The deal for right-back Young was confirmed later on Thursday.
Shorey had been expected to leave Reading since their relegation from the Premier League last season, with a number of clubs reportedly interested in his services.
The Londoner will fill the void left by Wilfred Bouma, who dislocated his ankle recently, and provide long-term competition for places.
O'Neill said: "Strengthening the squad has obviously been in our minds for quite some considerable time. Nicky Shorey is a quality natural left-back who played for England 18 months ago.
"Obviously the injury to Freddie Bouma has left a gaping hole on the left. Freddie had a wonderful season for us last year and this wasn't necessarily a priority for us before the injury.
"But Nicky Shorey is more than a back-up. He's a quality player on the ball and is up for the challenge."
Young provides Villa with a first-choice right-back after the departure of last year's incumbent Olof Mellberg, who has since left the club for Juventus.
"The right back position caused a few problems for us last season in terms of us not having a natural right back," O'Neill said.