Songfacts®:

• Thomas Rhett penned this '50s throwback cut with his "Die a Happy Man" collaborators Sean Douglas and Joe Spargur, along with his father Rhett Akins. "I really wanted to write a simple love song," Rhett told Billboard magazine. "A lot of times as songwriters, we try to over analyze every lyric, but what the '50s did so well - when you listen to Sinatra songs, why do we like them so much? It's because it's just easy to digest and it makes you feel amazing. We wanted to write a song like that, so that's where 'Sweetheart' was born."
• Rhett discussed the track during media listening party:
  
  "'Sweetheart' is probably one of my favorite songs on the record," he revealed. "I love doo-wop music, and I think that comes from, my grandparents versed me in that at a young age. It's nice to be able to put a modern twist on a '50s-sounding track and sing it in the most simplest form. I think just the title, "Sweetheart," is as simple a title as you can get. I think sometimes we write so detailed and so complex, but a lot of times, simplicity is what people want, and I feel like that's what we did with 'Sweetheart.'"