Watch: Duck Dynasty's Jessica Robertson Announces 18-Year-Old Daughter Priscilla Is PregnantThere's a new duckling entering the dynasty. Duck Dynasty's Jessica Robertson and Jep Robertson's 18-year-old daughter Pricilla Robertson is expecting her first child with her boyfriend. "Me & Jep are excited to welcome another new grandbaby in October," Jessica wrote in a July 20 Instagram post alongside pictures of Pricilla cradling her baby bump in a pink dress. "Priscilla will give birth to our granddaughter & we are blessed to add another grandbaby.