Now this is precious: Alyssa Milano retweeted an amazing #ThrowbackThursday photo which has her at 17 signing an autograph for Eva Mendes, who was 15 at the time and not yet famous.

Now 41 years old, Milano was then a big star on "Who's the Boss." Mendes, now 39, had yet to break break into the business. According to IMDb, Mendes' first role came nine years later, on the medical drama series "ER."

Also on HuffPost:

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  • Nicole Kidman

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  • Sofia Vergara

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