Bush, who starred on the series alongside Burton for nearly a decade, shared an intimate paragraph in honor of her long-time friend on Saturday. Burton turned 35.
"Happiest Birthday to my sweet @hilarieburton. Sister! We've been through a lot. At least 374 hair colors together. Crushes. Heartbreaks. Hangovers. Halloweens. Tears and laughter. Fear and joy. Successes and burn-it-to-the-ground failures. We've fought like rams and loved like family," Bush wrote.
"It's such a thrill to be in this place with you, 14 years after we first met and danced too late in bars -- still giddy that we were finally 21 -- and to watch you shine," she continued. "You're a champion for your community. An incredible mom. You're the alpaca whisperer. You're whip smart and razor sharp and deeply tender. There is no one I would have rather been on the world's most insane roller coaster with. And I'm so glad there's evidence that we both used to overpluck our eyebrows, undeniably, on the internet forever. At least we're not alone. I love you mama." She went on to hashtag the profound words, "#Breyton4eva #BreytonFeels #ShesMine #BetterInRealLife."
Burton has acted in FOX's Lethal Weapon since 2016, whereas Bush has starred in NBC's Chicago P.D. since 2014. While their careers have taken them in different directions, we're pleased to see that OTH never dies.