It seems like yesterday when Miley Cyrus's younger sister Noah was 10-years-old and posing in photos with her big sis. Now, she's a teenager and a spitting image of her 22-year-old sister.
Click through the gallery to see more celebrity siblings who seemed to grow up in the blink of an eye.
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Miley Cyrus and her younger sister Noah.
Click to the next slide to see what Noah looks like now.
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Noah's 15-years-old.
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Nicole Richie and her younger sister and brother Sofia and Miles Brockman.
Click to the next slide to see what they look like now.
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Miles is 21-years-old and Sofia is 17-years-old.
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Vanessa Hudgens and her younger sister Stella.
Click to the next slide to see what Stella looks like now.
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Stella's 19-years-old.
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Demi Lovato and her younger sister Madison De La Garza.
Click to the next slide to see what Madison looks like now.
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Madison's 13-years-old.
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The Jonas Brothers and their younger brother Frankie.
Click to the next slide to see what Frankie looks like now.
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Frankie's 14-years-old.
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Sofia Vergara and her younger sister Sandra.
Click to the next slide to see what Sandra looks like now.
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Sandra's 26-years-old.
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Britney Spears and her younger sister Jamie Lynn.
Click to the next slide to see what Jamie looks like now.