The 26-year-old is committed to the club for the next four years after initially signing on loan for the rest of the current campaign.
He told Villa's official website: " We've had a fantastic end to the current season - and now I am already looking forward to the new season starting
" It was important for the family to have that stability and I'm thrilled it's with a club like Villa
"This is the happiest I have been in a long time
Now it's about kicking on with my career in claret and blue
"I have already loved every minute of playing for this club
To be a permanent Villa player now is a fantastic feeling."
The former Swansea player, who has scored three goals for the FA Cup finalists since his arrival at Villa Park, added: "I feel I made a good start when I joined on loan and it's just a shame that I got injured.
"Obviously I got fit again but the team has been doing well and I've, rightly, had to bide my time.
"My aim now in the closing two weeks is giving 100 per cent in training and waiting for my next chance."
Source : PA
Source: PA