Sadie Robertson took a break from her Dancing With the Stars rehearsals this week to congratulate her big brother John Luke Robertson. John Luke popped the question to his girlfriend Mary Kate McEachern and she said yes. The Duck Dynasty family member became officially engaged over the weekend.

Sadie offered her congratulations to both her brother and his fiancee via Instagram.

Congrats @young_and_beardless & @missmarymcmcmc on the engagement last night. John Luke you did good my brother. Love y'all both so much ♥️

A photo posted by @legitsadierob on Oct 10, 2014 at 11:04am PDT

@John316Luke923 Talks Engagement to Mary Kate McEacharn: "I Just Knew" http://t.co/gs0UzIPlX6 via @usweekly @bosshogswife” @MaryKateMcE

— John Luke Robertson (@John316Luke923) October 15, 2014

Sadie Robertson was spotted just a few days before her brother’s engagement wearing her hair in a pair of adorable braids as she and DWTS pro dancer Mark Ballas prepared for tonight’s show. The two are dancing a rumba for this week’s competition.

Pitbull is filling in as guest judge for Len Goodman on tonight’s episode of Dancing With the Stars. Sadie Robertson will wear a ballerina-inspired costume that is gorgeous, but a bit on the sexy side, too. Duck Dynasty dad Willie Robertson must first approve any costumes Sadie wears on stage.

“I feel like a ballerina in it,” told E! before the show started. “It’s so beautiful. I love it.”

Maybe if Willie Robertson has a problem with Sadie’s costume, he’ll be too excited about son John Luke’s engagement to enforce his modesty rules this week. Even though the outfit is beautiful, it is sheer and a bit low cut.

Ready to cheer on this lovely @sadierob so proud of you! #dwts #teamquackattack #thequackpack http://t.co/diJjNQIPav

— Korie Robertson (@bosshogswife) October 20, 2014

Congratulations are certainly in order for the grandson of Duck Dynasty patriarch Phil Robertson and his future bride Mary Kate McEachern. And best wishes to Sadie Robertson on Monday’s Dancing With the Stars performance.