The actress and longtime activist released a statement Thursday via Twitter, writing, "We're devastated by the loss of Thaddeus, our beloved son and brother. He was wonderful, courageous person who overcame so much hardship in his short life. We miss him. Thank you for the outpouring of condolences and words of kindness," she continued. Mia concluded her statement with a link to the American Foundation for Suicide Prevention, writing, "If you or someone you love needs help, or if you want to support a group doing life saving work, please visit: https://afsp.org/."