Much too young to tell. 7 weeks is usually a good time, but if it develops a big, pink or red comb and wattles in the meantime, then you probably have a cockerel. If not, a pullet.
WOW, thats going to be a really special bird!
Like the Jed Jackson says above, to young to tell, but if you have a batch of all the same variety, you can sometimes get clues at this stage.
Like the roosters will be slighty bigger, and have bigger feet.
The roosters combs will start to pink up sooner than the hens.
If you made me take a wild guess.... i would say rooster, just going by the expression on his face.
I yould love to know if i am correct later when you know for sure.