Hilary Duff seems to announce birth as she shares snap of daughter Banks saying she's a 'big sister'

Pregnant Hilary Duff cradles her baby bump while rocking black maxi dress on Instagram

Pregnant Hilary Duff rocks a groovy green-and-white tie-dye kaftan while shopping in Los Angeles

Hilary Duff covers up her baby bump in a dress shirt and bicycle shorts while running errands in LA