Glen Johnson has signed a contract extension at Liverpool.
The Reds have not disclosed details of the length of the deal for the England defender, 26, who joined in 2009.
"We are absolutely delighted," said Liverpool director of football Damien Comolli. "It was easy to find an agreement because he wanted to stay and we wanted him to stay.
"We are very pleased he wants to commit long-term, and I think he was pleased we went to him and asked him to."
Johnson extended his stay at Anfield on the same day that manager Kenny Dalglish agreed a deal to sign Blackpool captain Charlie Adam and made an offer for Stewart Downing, which was rejected by Aston Villa.
Comolli added that ensuring Johnson remained at Liverpool was an important part of Dalglish's summer planning.
"His [Johnson's] best years are to come," said Comolli. "Very often defenders peak between 26 and 31, so he is just entering into those years where a maturity comes in and his knowledge of the game gets better and better. We are happy his long-term future is at Liverpool.
"It's obvious when you watch him play his technical ability is second to none. Physically he is absolutely fantastic as well and his fitness level is great.
"Towards the end of last season he showed how versatile he is by playing at left-back or right-back - mostly at left-back - and was outstanding.
"For us he is a great asset to have around. As we've always said, we don't want to sell our best players or sell our assets, and as long as the players are happy to be here, we're happy to commit to them."