Leeds have built their success around the talents of their youth products this season and Cellino is adamant that he has no interest in cashing in on any of his prized youngsters.
Instead he wants to build around the likes of Alex Mowatt, Sam Byram, Charlie Taylor and Lewis Cook, as the club look to move forward.
“My hope is for him [Cook] to stay at Leeds for a long time and continue growing with Mowatt, Byram, Taylor and the others. We don’t want to sell," Cellino said.
“My plan for this club is to grow, not to sell our best young players. I have a lot of trust in the young players here. It is a special place for them and it has been for many years."
Leeds fans are likely to be a little sceptical, despite Cellino's words, because the Italian did promise to keep Ross McCormack at Elland Road last summer, prior to selling him to Fulham.
However, actions speak louder than words and Cellino's commitment to keeping his best players at Leeds was shown today.
Cook signed a new two-year-contract this afternoon and Cellino was understandably delighted to have the 18-year-old's future secured.
“Lewis Cook deserves his new contract, he was one of the most exciting players last season.
“I knew we had a wonderful talent when I first saw him in the summer. At first, I thought he was much older than he was. He plays like he has lots of experience.
“Signing Lewis Cook is a good way to start the summer. We must be truly ready for the new season."
Cook also had time to celebrate the deal on social media site Twitter soon after signing his contract.