Leeds goalkeeper Scott Carson has completed his £1m transfer to Liverpool, signing a four-and-a-half year deal at Anfield.
The 19-year-old chose Liverpool ahead of a move to Chelsea, and will provide competition for Jerzy Dudek.
Carson said: "It's a relief that everything has been completed. I'm delighted to be here and can't wait to get started."
Liverpool's 20-year-old keeper Paul Harrison has moved to Leeds on loan.
Harrison, who was the only cover for Dudek while Chris Kirkland was out injured, will spend a month at Elland Road.
The Reds Academy graduate, who has yet to make a first-team appearance at Anfield, could make the transfer to Leeds permanent if he impresses.
Leeds spokesman Bryan Morris said: "We wish Scott the very best. He has proven himself to be a top-class keeper during his time at Leeds United and we are sure he will continue to impress at Anfield.
"His steady nerve in pressure situations and his professionalism on and off the pitch will ensure he has a bright future ahead of him."
"Hopefully I can settle in quickly, impress the manager and become an important member of the squad," added Carson.
"It's all happened very quickly. I never anticipated being here at Liverpool so soon in my career.
"I only played a few games for Leeds and expected to be there a bit longer. Things never worked out that way though and when Liverpool showed an interest in me I was overwhelmed.
"Just the fact that it's a massive club and the manager is building for the future. This club is on the up and I want to be part of that.
"I've worked with the likes of Nigel Martyn and Paul Robinson, so I've learnt things from them. Now I'll be training alongside two more great goalkeepers in Jerzy Dudek and Chris Kirkland, so hopefully that will help bring my game on even more.
"I'm sure there's a lot I can learn from them. They are two exceptional keepers and it's going to be a great experience working with them."