The actress posted a picture of herself sat in a beautiful white wedding gown yesterday (17 October), complete with a white veil and a french manicure. Oh, and she's bizarrely eating a pot of yoghurt too!
However, before we start thinking that Kaley is getting a little too carried away with planning her nuptials so soon after Ryan popped the question, her bridal outfit was actually for an upcoming film role.
Next to the snap, Kaley wrote the caption: "It's my wedding day!!!! #theweddingringer #fakeweddingcalmdown."
The 27-year-old is starring in a new comedy movie called The Wedding Ringer, alongside well-known comedian Kevin Hart, which is set to hit cinemas in 2014.
But even though her wedding dress might belong to the character she is playing on screen, we're sure she is picking up a few ideas for her own gown along the way.
How can she not be thinking about her own ceremony when she is surrounded by romantic props and wedding talk?!
Kaley and Ryan got engaged in September after dating for just three months.
And although it seems like their courtship may have been a little short, Kaley has insisted that Ryan is The One for her.
Speaking about how soon Ryan got down on one knee, the blonde haired actress said: "I know that it seems a little crazy on paper, but it's what works for us."
Do you think Kaley and Ryan got engaged too fast? Let us know below, as the best comment each week wins £50!