James Van Der Beek's on-screen momma just shared a heartbreaking post mourning his death. As we've been following, James died at age 48 on Wednesday after his fight with cancer. He leaves behind his wife, six kids, and many friends and fans. There's been such an outpouring of love for him - and just as much support shown to his family - and it's not ending anytime soon. Related: James' 'Heartbroken' Ex-Wife Heather McComb Mourns His Loss Taking to Instagram on Wednesday, one of the latest cast member to pay tribute to the actor was his Dawson's Creek mother, Mary-Margaret Humes.