John Luke Robertson and his future bride Mary Kate McEacharn might not be married yet, but the whole Robertson family already consider her one of their own and helped make her recent birthday the best one yet by showering her with words of love.

John Luke's mother shared a photo of Mary Kate on her Instagram account (@bosshogswife) and wrote, "Happy Birthday to this fun-loving, sweet-spirited, kind-hearted, Jesus-following girl who I am so excited to soon call my daughter-in-love @missmarymcmcmc #ILoveYou #HappyBirthday"

Meanwhile, John Luke's sister Sadie posted a photo of "soft smiles and soft serves" on her Instagram account (@legitsadierob), with her and Mary Kate holding hands and sharing ice cream together. "It's my best friends birthday. I love you my little Mary Cat," Sadie captioned the photo.

Last but not the least, Mary Kate's fiance John Luke planned a surprise for her, and he shared the video of her reaction on his Instagram account (@young_and_beardless). In it, Mary Kate opened the trunk of the car, only to discover that John Luke had been hiding there during the entire trip. Mary Kate could not help but laugh.

"Oh my God, no way!" she said.

John Luke wrote the sweetest greeting alongside the video: "HAPPY BIRTHDAY! This girl is such an amazing human! You are worth hiding uncomfortably under a blanket in the back of a hot suburban on a two hour drive! You are an inspiration! Can not wait to marry you and have more and more birthday surprises!" he wrote.

It looks like Mary Kate and the two Robertson siblings took a road trip to see a Taylor Swift concert for her birthday, and Mary Kate shared their photo on her Instagram account (@missmarymcmcmc). Mary Kate said that it was her best birthday yet, adding that one of the night's highlights was Swift's mother giving her the warmest hug.