Their friendship has seen them work on hit songs and as well as embark on a successful tour together.
And Taylor Swift revealed that her conversations with Ed Sheeran can start to veer on the silly side as she showed off part of their recent text conversations.
In the snap posted on Instagram, the messages started with Swift writing to Sheeran: "Got to sleep, I'll talk to you soon."
Her British pal then wrote: "That okay, tay... you'd think for multi-platinum lyricists we'd do better."