Billy Sharp and Enda Stevens have both signed new long-term contracts with Sheffield United.
Sharp, 33, has scored 23 goals in 32 appearances in all competitions this season and his new deal will keep him at the club until the summer of 2021.
Meanwhile Stevens, who joined on a free transfer from Portsmouth in the summer of 2017, has agreed a deal until the summer of 2022.
In a statement on the club's official website, United manager Chris Wilder said: "Both new contracts are fully deserved, they have been outstanding in their respective areas of the pitch.
"Billy is a natural goalscorer for us, we are delighted we have negotiated so that he can extend his period with the club. I would imagine he is looking forward to more successful times, he looks after himself and has that drive and desire to keep pushing on. The group has evolved and improved in my time here and he has done likewise.
"Enda has been outstanding since he came in. The way he plays the game, he has been a very important part of our progress in the last 18 months. I've always been a big fan of his. He has taken to Championship football really well and kicked on, which has resulted in him getting in the Republic of Ireland national squad.
"They are both here for the long-term, they are good players and hopefully they will keep moving forward with us."