Emma Watson walked the red carpet at the World Premiere of Harry Potter and the Deathly Hallows last night in London, posing with co-stars Daniel Radcliffe and Rupert Grint.

The 20-year-old actress wore a black lacy see-through dress trimmed with feathers.  She reportedly applied fashion tape to her back to prevent a wardrobe malfunction.

Last year the actress did experience a fashion mishap at the premiere of Harry Potter and the Half Blood Prince in London.  David Letterman made a big deal out of it when she appeared on his show.

Emma is a sophomore at Brown University in Providence, Rhode Island.   She spent the summer back in the UK with new boyfriend George Craig.

More London premiere photos in our gallery below:

Photos:  WENN

Filed under: Celebrities, Emma Watson