The 30-year-old was due to be out of contract at the end of the season but has agreed to stay on until the end of the 2012 season.
Webb joined the Rhinos in 2007 and stated that he never wanted to play his rugby anywhere else:
“It is great to have the deal done and now I can look forward to the future. Myself and my family are settled here at Leeds having been here for five years. The time has flown by and my life has changed a lot in that time for the better.
“I am still hungry to achieve more success and that was one of the reasons I signed again here at Leeds. I want to win more silverware and to do that you have to be surrounded by quality players, as we have here at Leeds.
“It was a big decision for me because of the stage I am at in my career but I was thankful when the club offered me a new deal and I am delighted to sign. There are some exciting times ahead here at the Rhinos with quality youngsters we have coming through the Academy and I am looking forward to being part of more success here at the club.”
Head Coach Brian McDermott added, “Brent is one of the smartest players in the game and he is a cog at the heart of what we do as a team. He has a lot of skilful attributes but he is also very charismatic and his benefits to our squad are not just what he does during the eighty minutes of a game at the weekend.
“This season, along with the rest of the first team squad, he has been helping to mentor our young fullbacks and I can think of no better person for them to try and emulate and learn his unique skill set from. He is a player that gets people excited when he touches the ball and I am delighted he has agreed to remain at the Rhinos.”
Webb has now made 122 appearances, including one substitute appearance, for the club and scored a remarkable 73 tries, to make him the most prolific try scoring full back ever in the clubs history.