Another "Duck Dynasty" wedding is in the works.

John Luke Robertson, the grandson of Phil Robertson, is engaged to his girlfriend Mary Kate McEacharn, E! News reported. The reality star proposed to her on Saturday, which was also his 19th birthday.

"I am so excited to marry my best friend. I know my parents married young as well, and they have always been examples of what 'could be' to me. Fast-forward 22 years and they are more in love than ever, and I hope Mary Kate and I are the same way in the years to come. God has truly blessed us," John Luke said to E! News on Sunday.

The eldest son of Willie Robertson and Korie Robertson also took to Instagram to announce the good news.

"She. Said. Yes. @missmarymcmcmc." In the post, John Luke holds up a sign that read, "Future Mrs. Robertson," with an arrow pointing at his fiancée and her engagement ring.

The bride-to-be also posted the same picture in black and white, with the caption, "Happy Birthday to the boy I'm going to marry."

John Luke's sister also uploaded a picture of the newly engaged couple at a party with the caption, "She said YES @missmarymcmcmc so excited to be your sister."

Congrats to the happy couple!

Yes, it's true @John316Luke923 proposed to this beauty @MaryKateMcE last night! We couldn't be more excited!!