Justin Bieber must be pretty excited about his first acting gig cause he's tweeted a picture of himself in an orange prison jumpsuit being lead away in hand-cuffs. But he let his fans know he didn't want to give away too much about his upcoming appearance on CSI. Here's the photo of Justin Bieber in a prison jumpsuit for CSI.

The Canadian teeny singing sensation put the photo on TwitPic and tweeted about his experience on the set.

He captioned the picture 'I told you I was a BAD MAN!'

Then he went on to tweet about his first acting experience was like.

'BIG DAY today ... excited. I'm ACTING!!! CSI BABY!! Im a BAD MAN!! lol.

Apparently his role is that of a juvenile delinquent (duh!), which shouldn't be a real stretch for his first role. No, he hasn't been in trouble with the law, yet. But then he's just 16 so give him time.

You can probably see Justin Bieber in his prison jumpsuit during the season premiere of CSI which airs on September 28th. I'm guessing he'll be tweeting all about it before, during and after the show!