The former Chelsea winger is in his second season at the City Ground.
Hudson-Odoi has penned a new deal to 2028 and told Forest's website: “This is home, and I’ve enjoyed every moment. I appreciate all the support and love I’ve been getting since day one, and coming here has helped me in every way possible.
“We have such an amazing group, and I can’t wait to keep going and enjoy the journey.”
Chief Football Officer, Ross Wilson, said: “It has been a busy summer for all of us here at Nottingham Forest. As well as strengthening our squad, we have also been active in extending contracts of the core of the team that has put us in this exciting position as a key part of our strategy.
“We all love Callum and from the first second we met back in 2023 to discuss him joining the club it has been a pleasure to work with him. Everyone knows how important he has been on the pitch, but he also plays a big role off it. He is popular amongst all of our players and staff, and we’re delighted he has committed to the Club signing this new deal. We are sure there’s more great moments to come from Callum."