Lisa Marie Presley honored her late son Benjamin Keough on what would have been his 28th birthday with a heartbreaking post on social media.

The 52-year-old shared a snapshot of Keough seated in front of a cake with candles from another birthday celebration.

My beautiful beautiful angel, I worshipped the ground you walked on, on this earth and now in Heaven. My heart and soul went with you. The depth of the pain is suffocating and bottomless without you every moment of every day, she began in the images caption.