If you thought the triplets couldn't get any cuter, guess again! These little boys just melt our hearts, especially when they're dressed up in cute costumes, or in this case, uniforms!

October 1 marks Song Il Kook's birthday and also Korea's Armed Forces Day, so the triplets dressed up in uniform as soldiers in the army, the navy, and the air force,�and topped it off with salutes.

SEE ALSO: ILLIT praised for making a significant improvement in recent encore live performance

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Like the proud father he is, the actor shared the photo to commemorate the occasion on Twitter. Happy birthday to Song Il Kook!

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songilkook