The 24-year-old singer posted an adorable photo of her on Christmas eve in which she and her brother Austin are wearing matching plaid Holiday jammies.
"Matching Christmas onesies is a thing that's happening right now," the singer captioned the pic.
The Grammy winner has shared several old home videos of her and her brother over the holidays. Austin, 21, is a junior at Notre Dame.
You can check out the rest of Swift's Christmas posts on her Instagram account.
Celebrity Families of 2014 [PHOTOS]