"Absolutely heartbreaking and unimaginable," Jenner captioned a throwback photo of Reynolds with her two children, Carrie and Todd Fisher. "As a mother I cannot imagine the pain and heartbreak of losing a child. A loving and devoted mother, grandmother and a true Hollywood legend... Debbie Reynolds, you will be forever missed but never forgotten!! My love and prayers are with Debbie and Carrie's family. "
It's been a busy holiday season for the 61-year-old mother of six. In the midst of honoring Reynolds and Carrie, the mother of six was dealing with her own family emergency after her son, Rob Kardashian, was briefly hospitalized for diabetes. See more in the video below.