El-Hadji Diouf put pen to paper on an extended deal after playing his part in Leeds' draw with Blackburn Rovers at Elland Road.
The 31-year-old will now be a Leeds United player until January after agreeing terms with Leeds after lengthy discussions over a number of weeks.
After completing his move Diouf spoke about the move and expressed his delight at signing with the Whites.
"I feel great because I am happy to sign for one of the biggest teams in England and in the world, so I am very happy. I didn't expect to have the crowd and the fans for the welcome to this football club.
"I got a better offer somewhere else but the challenge at Leeds United is big and wonderful and hopefully we will be in the Premier League next season. If we can get Leeds into the Premier League next season it will be amazing.
"We can definitely finish in the top six, why not in the top two. We just have to keep working hard and we will see, there are plenty of games still to go.
"I am not yet fully fit. I just need to continue to train and work hard and I will keep going. The gaffer and the staff are going to help me and I am hoping to be fully fit in about two weeks."