The “Daisy Jones & the Six” star marked her first Mother’s Day without Presley, who died after suffering cardiac arrest at age 54 in January.
“Lucky to have had the best and most deeply loving mama I could have asked for,” wrote Keough, the eldest grandchild of Elvis Presley, alongside a photo of her, her mother and her father, Danny Keough.
The post from Riley Keough follows news that she’s started a family of her own with Ben Smith-Petersen, her husband since 2015.
Smith-Petersen, who read his wife’s eulogy at Presley’s memorial, shared that he and the actor welcomed a daughter last year.
“I hope I can love my daughter the way you loved me, the way you loved my brother and my sisters,” Smith-Petersen said as he read the eulogy.
“Thank you for giving me strength, my heart, my empathy, my courage, my sense of humor, my manners, my temper, my wildness, my tenacity. I’m a product of your heart, my sisters are a product of your heart, my brother is a product of your heart.”