The daring Duchess of Cambridge is pulling an Angelina Jolie showing off her sexy legs in a dress with a thigh high slit!

Kate Middleton looked stunning in a white Roland Mouret floor length gown Tuesday night and her gorgeous gams were on full display with the revealing slit up the front of her dress, and RadarOnline.com has the stunning photos.

PHOTOS: Kate Middleton Shows Off Her Sexy Legs

The Duchess of Cambridge was flying high on the fashion front on Thursday, boarding a plane to Canada in unusually expensive duds – and RadarOnline.com has all the details, as well as the price breakdown of her designer look.

Princess Kate, who usually rocks cheap and chic duds, showed off her famous figure in an RM by Roland Mouret Manon sheath dress (a favorite of Hollywood stars such as Penelope Cruz and Naomi Watts), which originally retailed for a staggering $1,555.

Kate Middleton's Style - See The Photos