If Just 17 is your favourite magazine you might have to find a new soon as the last issue could be on its way.
The people who make it, Emap, have said it isn't selling as many copies as it used to, so they're not sure if they want to keep publishing it.
They said they could sell the mag to another publisher, give it a new look or even close it down completely.
Just 17 was launched 21 years ago and was one of the first magazines of its type but now there are loads of others.