James Cameron and the gang--including Terminator alum Sam Worthington and Alien legend Sigourney Weaver--officially welcomed the much anticipated CGI wonder Avatar into the world at Odeon Leicester Square.

Some ensembles were weird (e.g. Pussycat Doll Kimberley Wyatt in a red armor-of-the-future fitted dress), some frumpy (Michelle Rodriguez), but there was one, and only one, who was gloriously glamorous.

The long, lean and lovely Zoe Saldana glowed in a stunning Roland Mouret mermaid gown, keeping the accesories simple--simply elegant.