Keira Knightley, Kim Kardashian West, and More Women Who Turn Mom-Chic Hair Into an Art

Before models stepped out onto the red carpet with bedhead--and a blast of salt spray all but replaced the Mason Pearson--there was everyone's first hair icon: Mom. Projecting the kind of disheveled chic that comes when a heat-styling routine is traded in for a winningly tousled texture--helped along by a toddler tugging at every wisp--it's no wonder that slept-in strands hold a special magic. Take Keira Knightley, who was recently spotted with her daughter, Edie, while her long fuzzy layers act...