The former Elche midfielder signed for Villa yesterday.
"I'm delighted to be here, it's something I have always dreamed of and it is very important for me to be here at Aston Villa, not only for me but for my family as well," Sanchez said.
"It was always my aim to play in this country and in this league and I know Villa well as Juan Pablo also played here.
"I began to watch Villa games when he came in 2001. He was a goalscorer who was very important to this club and I followed his time here because he was always scoring goals.
"Since I was a boy I have always followed English football, particularly teams where Colombians have played. When I had the chance to come to this club I had no doubts because I know this is a big club in the Premier League."
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