Gone far too soon.
Stone captioned the video, "River William Stone Sept. 8, 2020 - Aug. 30, 2021." In it, she shared a video from River's short life, featuring her playing with her sweet, smiling nephew. She also posted a photo featuring his big blue eyes.
Support flooded in for the star as people expressed their condolences to Stone and her family.
"This breaks my heart," actor Leslie Jordan commented. "I'm in pieces right now." Sean Hayes added, "Ugh. I'm sitting here in tears. I'm so sorry, Sharon. What a beautiful boy. Sending all my love to you and your family."
Selma Blair wrote, "I am so sorry. My lord."
Just three days prior, the actress had posted an Instagram asking her followers for support, announcing that River "was found in his crib w total organ failure today." She asked her Instagram community, "Please pray for him. We need a miracle."
Many stars wrote in on Stone's first post about her nephew and godson.
Kate Hudson commented, "Sending light and healing love."
"Orange Is the New Black" star Ruby Rose said, "Praying for River and your whole family."
Stone introduced River to the world on Sept. 13, 2020. She wrote on the post, "Look who's going home: River William Stone, my brother Patrick and his wife Tasha's new baby."