Blue Body Suits = $40
Dreadlocks Wigs = $60
Fulfilling your dream of an Avatar themed wedding! = PRICELESS

Considering the extent which people are willing to go for movies that they love this type of themed wedding is not surprising.  My cousin had a Star Wars themed wedding.  Unfortunately I was not able to go, but I hear it was awesome, just like I am sure the wedding was a lot of fun above. 
According to the Unique Daily the bridesmaids were not actually thrilled:
Newlyweds have been screaming blue murder over their ‘Pandora weddings’ set among the stunning mountain range used in blockbuster movie Avatar. Enterprising events organizers in natural beauty spot Wu Lingyuan, southern China, are cashing in on the fact that James Cameron used their stunning mountain range as the inspiration for his fantasy planet’s floating peaks. But the not-so-special effects provided by local tourist bosses to give couples an out of this world wedding day have infuriated newlyweds who paid up for the stunt. Bride Xiao Tsao, one of five couples recently married in a joint service, said: ‘The Navi were a couple of forestry workers dressed up in long underwear dyed blue wearing some very unconvincing masks. It was really pathetic.
Source: /Film