They've proven time and time again that they're incredibly tight, and basically all best friends.
But one of the best things about them is how often they roast each other online.
And for once, it's not KJ Apa and Cole Sprouse.
Instead, Casey Cott (Kevin Keller) and Charles Melton (Reggie Mantle) are having some hilarious Twitter banter, and we're living for it.
“ABSOLUTELY started listening to Christmas music today,” Casey tweeted. “I’m so stoked.”
Honestly, same Casey, but Charles wasn't having it.
“Good for you,” Charles clapped back. “No one cares.”
Lol. WE CARE CASEY!
But it didn't end there. Casey responded to the sass, with: “Love when a fan of mine tries to ruin my day! Nice try Melton! #whoareyou #retire.”
“You are worthless," Charles simply replied.
Ahh, we can smell a strong #bromance brewing already.