It’s a shocking headline this morning, the father of actress Hayden Panettiere announcing her death, saying she was “an incredible light and a force of nature who brought immeasurable love and joy to all who knew her.” While there is no official cause of death yet, Panettiere had just released a memoir in May where she wrote about her struggles with postpartum depression, addiction, the sudden loss of her brother and painfully handing over full custody of her daughter to her ex-fiancee. Tributes have been pouring in online; friends and fellow actors expressing disbelief that Panettiere could be gone so soon.