theprestige
Penultimate Amazing
That is correct (according to Wikipedia). I believe he is still on parole, which may qualify as "serving time" for certain definitions of "serving time".
One thing I've picked up from this forum is that there's a cultural divide between the US and the UK on this topic. In the US, the general sense is that parole isn't quite the same thing as serving time. This might be mostly due to its portrayal in popular fiction, where criminals generally seem to treat it as a system to be gamed or simply ignored. Thus, culturally in the US, parole = "pro forma, not really serving time anymore". In the UK, being out on parole (or whatever the correct technical term for the equivalent) seems to be seen culturally as being a fully-featured part of the actual sentence.
In the US: "He served 5 years of a ten year sentence, and then got out on parole."
In the UK: "He served a ten year sentence, half in prison and half on parole."