The Welsh international is currently on loan from Crystal Palace.
Williams is, of course, a player full of pedigree. He was a star in the Palace side as a teenager and even won caps for Wales.
Recently however the 22-year-old has had to battle through some serious injury problems.
In 2011 he broke his leg playing for the Welsh Under-21 side and he has been battling several fitness issues ever since – including a long-standing groin problem.
Williams is now fully-fit and has featured for Wales and Forest regularly in recent weeks.
His progress is good news for Forest fans but also Palace followers - who continue to believe in his innate ability.
One such man is Danny Gabbidon. The former Welsh international was with Williams at Palace for two seasons and believes Alan Pardew will get the best out of the Forest loanee.
He told South London Press recently:
“Jonny has been really unlucky with injuries. He is such a quick and nippy player that tackles on him can come a bit late and he comes off worse.
“But he has the talent and attitude to succeed at Palace. He did really well for Forest against Derby last week [v Derby]. He needs to play week in week out to get back to his best and hopefully his injury problems are behind him now. He is still young and growing.
“With the Euros coming up, there is no reason he can’t get into the Wales side. Chris Coleman is a big fan of him. He’s putting himself back on the map.
“He just needs a manager that believes in him and gives him that chance - Alan Pardew can be the right man. He was my manager at West Ham and he was never frightened of giving young players a chance.
"He is not scared to leave out an established player if a youngster is performing better.
“Hopefully Jonny will come back raring to go. Some managers might see him as too small but Pardew judges players on their ability.”
Williams' career has certainly had its ups and downs, with more of the latter recently.
Gabbidon is however not the only man who believes in the player and if he can continue his current progress then there might very well be a future for him at Palace after all.