Celebrity 'Duck Dynasty' 's John Luke Robertson Is Engaged "She. Said. Yes," wrote the Duck Dynasty star, as his bride-to-be showed off her ring By Alison Schwartz Published on October 12, 2014 12:00 PM Share Tweet Pin Email Photo: Courtesy John Luke Robertson John Luke Robertson is one lucky duck: His lady love said yes! The Duck Dynasty star proposed to girlfriend Mary Kate McEacharn on Saturday, later posting a sweet snapshot to share her response. “She. Said. Yes,” Robertson, the eldest son of Willie and Korie, wrote on Instagram alongside a picture of his bride-to-be flashing her ring next to a “Future Mrs. Robertson” sign. The Duck Dynasty star had plenty to celebrate: Saturday was also his 19th birthday. “Happy Birthday to the boy I’m going to marry,” McEacharn added on Instagram. No surprise here: The engagement seemed like a true family affair. “She said YES,” wrote Rebecca Robertson, sharing a photo with the couple. “@missmarymcmcmc so excited to be your sister.” Mostly, we’re hoping cameras were rolling to capture their engagement. Teased fellow A&E star Reed Robertson on Twitter: “Coolest engagement/birthday party ever.” Willie Robertson Is Thrilled by Daughter Sadie’s DWTS Performance (VIDEO) Want more stories like this? Sign up for our newsletter and other special offers: sign me up Thank you for signing up! Willie Robertson Is Thrilled by Daughter Sadie’s DWTS Performance