The answer you find out won't shock you: He had to ask permission from the producers behind 3rd Rock from the sun to get it cut, wasn't allowed to do so otherwise.
Always got annoyed with his long hair when I watched the show as a kid, and I still remember the episode where he gets it cut and I was like "oh my god he looks so much better now!"
Yes. 3rd Rock was 1996-2001. Hanson was peaking around then.
https://en.wikipedia.org/wiki/Hanson_(band)
River Song: Well, I was off to this gay gypsy bar mitzvah for the disabled when I thought 'Gosh, the Third Reich's a bit rubbish, I think i'll kill the Fuhrer'
Having never heard of this show, it really makes me think about how JGL has been steadily working for years but never really seems to seek the limelight. Dude could have been Nightwing, that was the one takeaway that could have been good from tdkr. He was perfect for the role.
http://i.imgur.com/0UFI0T9.jpg
Current Events» 25 years later, I finally know why Joseph Gordon Levitt had long hair as a kid: