The 24-year old winger today passed a medical at Melwood and has signed a long-term deal with the Reds, joining for an undisclosed fee from Dutch club Heerenveen.
"I'm very happy to play for this big club," he told Liverpool's official website.
"The first time I spoke to the coach I had a good feeling. I had offers from other big clubs but I've been waiting for this moment.
"The coach gave me a good feeling. It will be a dream to play with these big players and I hope training will help me to be a good player here.
"When I watch Liverpool it's always a good atmosphere, the fans are fantastic and I'm happy to be here."