That 's part of the reason she said she loves featuring Rebecca Minkoff 's designs on the show . Mandi Smith is the costume designer behind ABC Family 's ` ` Pretty Little Liars '' A new , top - secret storyline will influence Spencer 's ( Troian James ) wardrobe , she says . At times , outfits are ` ` hilariously inappropriate for what we 're doing , '' Bellisario says . Emily , the queen of simple tank tops and tees , will really step up her game , Line says .
Mandi Smith is the costume designer behind ABC Family 's ` ` Pretty Little Liars '' A new , top - secret storyline will influence Spencer 's ( Troian James ) wardrobe , she says . At times , outfits are ` ` hilariously inappropriate for what we 're doing , '' Bellisario says . Emily , the queen of simple tank tops and tees , will really step up her game , Line says .