By Jennifer Davis
Updated Jul 21, 2014 @ 12:13 pm
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John Stillwell - WPA Pool /Getty

By George, he's walking! In honor of his first birthday tomorrow, Kensington Palace released this photo of Prince George as part of a three-part photo series to commemorate the little prince's big day.

Looking adorable in a navy blue polo shirt and seersucker overalls (a signature look for the young prince), George shows off his newly finessed walking skills at a butterfly exhibit at London's Natural History Museum. We first saw him toddling around last month with a bit of assistance of mom Kate Middleton during a Father's Day polo match, but now the soon-to-be 1-year-old is flying solo. He's growing up so fast!