The Duchess of Cambridge risked getting a wardrobe malfunction when she attended the film screening of "Spectre" in London on Monday.

Kate Middleton looked regale and glamorous as she walked the red carpet wearing an aqua blue dress from her favorite designer Jenny Packham. Although at first glance the dress seemed demure, a closer look revealed Kate went to the premiere without a bra on.

The sheer dress Kate wore to the screening had a slit on the back, which showed some of the duchess' skin. Apparently the open back also meant Kate had to attend the event without a bra on. The dress was also risqué according to Now Magazine, because of the sheer quality of the fabric and not to mention that it also has a scooped neckline.

The 33-year-old completed her look with a pair of chandelier dangling earrings and a pair of sparkling high-heeled peep-toe sandals. She also wore a sparking silver belt to compliment her mini clutch bag. The duchess had her hair tied up in a bun leaving off a few strands to fall across the side of her forehead.

Kate was accompanied to the premiere by her husband, the Duke of Cambridge Prince William. Prince Harry was also in attendance. Both brothers look dapper in their tuxedos. Photos of the royal family arriving at the red carpet event are shared by Mail Online.

Kate took some time off from mother duties and left Prince George and Princess Charlotte with the nanny to enjoy the night with the cast of "Spectre." She was photographed talking to Bond Girl Lea Seydoux, movie director Sam Mendes and James Bond star Daniel Craig, who was accompanied to the premiere by his wife, actress Rachel Weisz. Prince Harry also enjoyed a chat with the "Spectre" star and Seydoux.

According to Mail Online, the Duchess of Cambridge's wardrobe choices have reportedly turned daring since becoming a mother. Milda Chellingsworth, founder of Styling for You London, complimented Kate for the gown she wore to the premiere. It reportedly proved that she "has secured her own sense of style."

Meanwhile, Naomi Isted, Editor of The Ultimate Lifestylist and a fashion and beauty influencer, likewise praised Kate's courage to go braless. She also noted how the duchess' outfits are becoming daring.

"Last night's premiere confirmed this with a stunning yet uber sexy Jenny Packham gown. It may have been floor length, but who would have expected the Princess to wear a sheer, backless and braless dress? It looked stunning and she wore it with royal poise," she said according to Mail Online.