Dress: Poppy Dress in Navy by The Reformation (Thanks olihju!)
Alison DiLaurentis (played by Sasha Pieterse) on Pretty Little Liars on Freeform was spotted wearing this navy bridesmaid dress on Pretty Little Liars on episode 'Til DeAth Do Us pArt' (7x20) in Jun 2017. Alison's Dress is the Poppy Dress in Navy by The Reformation .