1.
Sister, Sister, everyone's favorite '90s sitcom, first aired on April 1, 1994.
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And ever since Tia and Tamera Mowry entered our lives playing characters by the same names, nothing's been the same.
3.
Can you believe these twins, who were adopted by different parents, had lived into their teenage years before actually knowing the other existed?
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Thankfully, they found each other!
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And became one big happy family with their adopted parents, Lisa (Jackée Harry) and Ray (Tim Reid).
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Lisa's character really was a gift to us all.
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She brought out the best in her girls.
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Ray was a little more strict, but he was still a part of funny moments that made us laugh!
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Also, you can't forget about their annoyingly adorable neighbor, Roger!
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And the iconic catchphrase that his presence inspired.
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Let us not forget when the Olsen twins joined Tia and Tamera on Sister, Sister for the ultimate twin takeover.
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Tia and Tamera taught us important life lessons about growing up.
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They went through the same kinds of struggles as the rest of us, which made everyone feel better about being a teen.
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Because, let's be real — all that stuff gets pretty awkward.
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From their classic outfits to their adorable hairstyles...
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...these two *REALLY* helped define the '90s.
19.
Thanks for the memories, Sister, Sister!
