By peoplestaff225
Updated December 14, 2008 09:00 AM
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Bauer Griffin

Happy Birthday Milo William Langdon! This New York City kid is 4 years old today. Son of model/actress Liv Tyler and singer Royston Langdon — who split this spring after five years of marriage — the little guy has his mom (and granddad’s!) famous lips and rocker dad’s blond locks. But there’s much more to this toddler than looks — we’ve been lucky enough to watch Milo blossom into a curious, inquisitive young boy. Being raised in the city has allowed the only child — who got his name because he "looked like a Milo" — opportunities to shop, travel and even chase pigeons! We look forward to watching the 4-year-old continue to learn and grow in the years ahead.