The A-list cast of Sherlock Holmes ventured over to London for the World Premiere of the long awaited film.  Though it was a rainy night, Rachel McAdams got gorgeously gowned in a grey, Grecian style Andrew Gn one-shoulder number, adding statement earrings and Christian Louboutin heels.

PHOTOS:  Rachel McAdams, Gwen Stefani, Robert Downey Jr., Jude Law, Gavin Rossdale, Kelly Reilly, Guy Ritchie And Heather Graham At The Sherlock Holmes Premiere

Gwen and Gavin were a coordinating couple, both rocking the black and white look.  Want all the details haute off the red carpet?  Check out the gallery in Style.

PHOTOS:  Gwen In Her Favorite New Trend

• TAGS

• Style
• Andrew Gn
• Gavin Rossdale
• Guy Ritchie
• Gwen Stefani
• Heather Graham
• Jude Law
• Kelly Reilly
• Rachel McAdams
• Robert Downey Jr.
• The Sherlock Holmes