The couple are completely smitten and aren't afraid to admit it when it comes to social media.
But perhaps the clearest message Luke has ever sent to the Gogglebox star came over the weekend, when he admitted she wanted to get hitched with a cute Instagram snap.
"I think I want to marry you," he wrote alongside an adorable pic of them dressed for a wedding.
Scarlett also shared the same snap, but she gave a more subtle caption with the words, "Midnight pose" alongside a heart emoji.
Regardless of her relationship status, Scarlett looked absolutely sensational in the slinky red dress she wore to her pal's big day.
The reality TV star has shed an astounding two stone lately through healthy eating and exercising and nobody can deny that she looks amazing.
The star has worked hard for it, landing a fitness DVD deal in the process, so it's understandable to hear her get emotional about it.
Last month, she wrote on Instagram, "Crying like a baby today, Cant believe I've lost 2 stone Feel so proud Honestly if a professional couch potato can do it, anybody can! #weight #fitness [sic]".
We're proud of you too, Scarlett!