Photographed outside the venue, Waterhouse wore a floor-length black dress that featured a deep plunging neckline and an open, backless silhouette. The gown’s most eye-catching detail was a high slit that ran well above the thigh, revealing her legs.

Waterhouse completed the look with subtle yet distinctive details that added contrast to the otherwise minimal black gown. The dress featured a white bow-like accent positioned at the hip, drawing attention to the dramatic slit and creating a sharp visual break against the dark fabric. The unexpected pop of white highlighted the dress’ asymmetrical cut and further emphasized the length of the silhouette as she posed for photographers.

As seen by the pictures posted on X, she paired the gown with simple black strappy heels. Her blonde hair fell loosely around her shoulders, while her makeup remained soft and natural. This allowed the clean lines and striking proportions of the Saint Laurent design to stand out. Photographed against the stone columns outside the show venue, Waterhouse’s look blended modern elegance with classic Parisian restraint. Her confident stance and relaxed posture highlighted the gown’s backless construction and the dramatic height of the slit without appearing overly styled or theatrical.

Waterhouse’s appearance aligns with her long-standing presence within the fashion world. She frequently attends major runway shows and collaborates with luxury houses. Her Saint Laurent look at Paris Fashion Week reinforced her reputation for choosing sharp, modern silhouettes that balance sensuality with restraint.