The American actress and model stripped down to lingerie for a London Fashion Week 2018 protest which promoted body positivity.
Hayley, 25, led a bevy of plus-size beauties who were bolstering the cause.
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The blonde, who is Baywatch star David Hasselhoff's youngest daughter, was seen showcasing her figure in a lace-trimmed black negligee, which flaunted her busty cleavage.
She teamed this with matching heels, to elongate her shapely pins.
Hayley was also rocking a silk nightgown, to keep her warm in the London wind.
She also rocked a peach-coloured eyeshadow and lip shade to enhance her natural beauty.
Meanwhile her golden locks were styled into bombshell curls.
Hayley smouldered at the camera and poses in line with her fellow model beauties.
They were dressed in an array of different red, black and grey lingerie too as they unleashed their figures.
The women held up signs, which included the phrases: "Love your curves," and "Curves shouldn't mean compromise."
The protest was organised by plus size clothing brand Simply Be.
Hayley regularly appears on This Morning holding her own plus size fashion section on the show, so the cause is clearly dear to her heart.
The protest comes after models have revealed they were told by fashion execs they were "too fat" to model, despite being a healthy 10 stone.
