Hi everyone!

As a result of a work project, Alan and I have been invited to a black tie ball on January 16th. Obviously I'm looking forward to dressing up in my finery but I am unsure about what is suitable for a black tie occasion. I have a couple of dresses which might be suitable for black tie but I really need some input!

Also, I really want to make a good impression for Alan's sake as he is probably one of the younger people invited to the ball and it is a project which he put a lot of effort and time into completing. I'm also five years younger than Alan so I probably will be the youngest person there so I don't want to look like a student who just wandered in...

Green dress I wore for graduation: http://adressandabike.files.wo.....c11798.jpg

Grey dress: http://adressandabike.files.wo.....nov_09.jpg

Print dress: http://www.asos.com/Mango/Mang.....;clr=Multi

I also have a dark red dress which I don't have a photo of but is cut similarly to this: http://files4.lookbook.nu/file.....ffodil.jpg

All these dresses hit me right about the knees. Are any of them suitable for black tie?

Does black-tie for men mean that Alan should wear a tuxedo?