1. Sister, Sister, everyone's favorite '90s sitcom, first aired on April 1, 1994.
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2. And ever since Tia and Tamera Mowry entered our lives playing characters by the same names, nothing's been the same.
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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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4. Thankfully, they found each other!
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5. And became one big happy family with their adopted parents, Lisa (Jackée Harry) and Ray (Tim Reid).
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6. Lisa's character really was a gift to us all.
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7. She brought out the best in her girls.
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8. Lol. *takes notes*
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9. Ray was a little more strict, but he was still a part of funny moments that made us laugh!
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10. Also, you can't forget about their annoyingly adorable neighbor, Roger!
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11. And the iconic catchphrase that his presence inspired.
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12. Let us not forget when the Olsen twins joined Tia and Tamera on Sister, Sister for the ultimate twin takeover.
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13. Tia and Tamera taught us important life lessons about growing up.
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14. 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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15. Because, let's be real — all that stuff gets pretty awkward.
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16. From their classic outfits to their adorable hairstyles...
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17. ...these two *REALLY* helped define the '90s.
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18. So. Much. Nostalgia.
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19. Thanks for the memories, Sister, Sister!
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