Walker made his debut for the Reds as a substitute against Rotherham United at the City Ground on March 18.
The 18-year-old forward came on as a replacement for Chris Burke in the 92nd minute of the Championship clash, which Forest won 2-0.
Walker came on in the 83rd minute for Ben Osborn in the 3-1 defeat to Norwich City at Carrow Road on Saturday.
The youngster, son of Forest legend Des Walker, is rated very highly, and Freedman expects him to be a first-team regular by the time he is 20 years old.
“I'm putting a lot of pressure on the kid but I'm telling you like it is,” the Scot told The Daily Mail last week before the game against Norwich. “This kid will be a regular in this football team in the next couple of years.
“I have no problem saying that because I know his mentality, he won't be big headed. I know his upbringing. Watch out for him.”
It is a bold prediction from Freedman, but it seems that the Forest manager genuinely thinks that Walker is that good.
The 40-year-old has been in charge of the Nottingham-based outfit for less than two months, but it appears that Walker has made a huge impression on him.
The teenager has yet to make his mark on the first team in his two appearances so far, though, but the forward is certainly one for the future.
Walker is known for his combination of pace and power. He has an eye for goal and can move past defenders with ease, attributes which will help him succeed for the Forest first team in the coming years.