Their oldest son , Ryder , died at age 23 on October 27 , 2013 , in a car collision , when he was hit by two cars after his car broke down on the Glendale Freeway . Ryder was a singer and songwriter performing in his band Ryder Buck and the Breakers , and was recovering from a year-long battle with a Stage 4 testicular cancer . On March 2 , 2014 , upon accepting the Academy Award for Best Animated Feature for co-directing '' Frozen '' at the 86th Academy Awards , Buck dedicated the award to his son Ryder
86th Academy Awards
86th Academy Awards
Chris Buck