Hilary Duff opts for a casual cool as she steps out with her daughters in Studio City

Hilary Duff Talks Working With Neil Patrick Harris & Hopes for More 'How I Met Your Mother' Cameos on 'How I Met Your Father'

Hilary Duff Says 'Goal Is to Collect All' 'HIMYM' Stars After Neil Patrick Harris' 'HIMYF' Cameo (Exclusive)

Hilary Duff Wants Harry Styles to Play Her HIMYF Love Interest