Black-Tie Marble Staircase Couple Portrait

Using the uploaded photo, create a photorealistic vertical 4:5 luxury editorial portrait of the same couple standing together halfway down [a sweeping white marble staircase]. KEEP — Preserve both people’s exact facial identities from the uploaded photo, including face structure, forehead shape, eyebrow placement, eye shape and natural eye colour, nose bridge and tip, lips, cheeks, cheekbones, jawline, chin, ears, natural asymmetry, original skin tone, pores and fine skin texture. Keep each person’s natural hairline, hairstyle, hair density and visible facial hair unchanged. Keep their original body proportions, shoulder width, height relationship, hand structure and realistic anatomy. Do not replace either person with a generic fashion model. CHANGE — Dress the woman in [a sculptural black evening gown made from matte silk or heavy satin], with clean architectural folds and a controlled floor-length silhouette. Dress the man in [a black velvet dinner jacket, crisp white dress shirt and black bow tie], with realistic velvet texture and tailored shoulders. Change the pose so the woman stands slightly ahead on one stair while the man stands close beside her, both facing the camera with composed expressions and naturally relaxed shoulders. Place their hands together near the center without altering finger length or anatomy. Change the background to [a grand marble staircase with dark architectural railings and a large chandelier]. SCENE — Set the portrait inside [an elegant formal interior during evening]. Show several staircase steps behind them, with the upper architecture becoming softly blurred rather than disappearing. Keep enough marble detail visible to establish depth and scale. LIGHT — Use soft directional light from the large chandelier above and slightly in front, with gentle frontal fill so both faces remain evenly readable. Add subtle side separation on their shoulders while keeping the black clothing richly shaded. CAMERA — Shoot at 85mm, f/2.8, camera positioned at chest height, with the lens centered toward the couple. Keep both faces within the sharp focus plane while allowing distant staircase details to soften naturally. GRADE — Convert the image to refined black-and-white with deep charcoal blacks, controlled white highlights, smooth mid-gray skin tones, restrained contrast and subtle fine-grain texture inspired by high-end fashion editorial film. OUTPUT — Vertical 4:5 composition, [2048 × 2560] resolution, realistic studio-quality detail. DO-NOT — No face slimming, no skin whitening, no changed eye colour, no plastic smoothing, no invented jewellery or tattoos, no altered facial proportions, no extra fingers or distorted hands.