Katie Holmes is mourning her friend and Dawson's Creek costar James Van Der Beek. Holmes wrote in a handwritten letter shared via Instagram early on February 12, "James, thank you. To share space with your imagination is sacred - breathing the same air in the land of make-believe and trusting that each other's hearts are safe in their expression." She added, "Bravery. Compassion. Selflessness. Strength. An appreciation for life and the action taken to live life with the integrity that life is