Millie Bobby Brown’s “before and after” mainly reflects normal aging, style changes, and some likely cosmetic dental work rather than any confirmed plastic surgery.

Face and features

As a child on season 1 of Stranger Things (around age 12), she had a very soft, rounder face, fuller baby fat, a shaved head for the role, and minimal makeup. In her late teens and early 20s, her face appears slimmer with a sharper jawline, more defined cheekbones, and fuller-looking lips, which many experts and commentators say can largely be explained by puberty, weight distribution changes, contouring makeup, and lighting, with only speculation (not confirmation) about minor fillers or a nose refinement.

Hair and styling

Her early public image was closely tied to a shaved or very short haircut and simple, age-appropriate outfits. In recent years she has adopted long waves, then honey-blonde and later platinum-blonde hair, plus more mature red-carpet fashion and heavier glam makeup, which strongly contributes to people feeling she looks “older” in after photos.

Teeth and smile

Early in her career, her teeth showed mild crowding, small imperfections in shape, and a more natural color. By about 2020 she appeared with a straighter, whiter, and more uniform smile, consistent with orthodontic treatment (braces or aligners) and cosmetic dentistry such as bonding, veneers, and professional whitening, giving a noticeably more polished “after” look.

Surgery rumors

Online discussions often point to possible rhinoplasty, lip or cheek fillers, jawline contouring, or even breast augmentation, but none of these have been confirmed by her. Surgeons commenting publicly stress that many of the changes people see in before-and-after comparisons can be explained by her maturing from 12 to her early 20s, combined with professional styling and photography, rather than clear proof of major surgery.