Sadie Robertson's boyfriend Blake Coward just turned 19, and the young Duck Dynasty star is not passing up the chance to send her beau a happy birthday greeting and shower her "prince charming" with love.

Sadie shared on her Instagram account (@legitsadierob) a collage of happy photos of her and Blake, then captioned it: "Happy birthday to my Prince Charming. You are a true one of a kind & I literally thank God for your life every single day. I know it's gonna be hard to top last year, but let's make this the best year EVER. I love you more & more every single day my 19 year old sweetheart."

The two have been going out for over a year now, and Sadie cannot help but gush how wonderful her boyfriend is to her. One time, Sadie woke up from a nightmare, and despite it being 4 a.m., Blake still took her call and soothed her fears.

"He actually answered & very sweetly helped me go back to sleep. Yeah he is pretty amazing," Sadie shared, adding that she didn't know how she got so lucky.

Since he went away for college, Sadie and Blake have been making their long-distance relationship work. Sadie admitted that it's quite tough, so the two remember "to be kind, remember why you work for it, love always, stay faithful, trust each other, and laugh at the hilarious FaceTime screenshots."

During her prom night, her boyfriend was not able to escort her since he had a baseball game lined up, so Sadie went to the prom with her cousin instead.

"I was a little bummed," she confessed. So how did Blake make it up to Sadie? "He literally got on a plane right after his baseball game & showed up with flowers at the after party & completely surprised me just to make my night more special. I know... I'm lucky," Sadie shared.