Big Nutbrown Hare is a character from the beloved children's book "Guess How Much I Love You," written by Sam McBratney. He is a large, gentle hare who often expresses his love for his little friend, Little Nutbrown Hare, through playful comparisons and imaginative measurements. The story highlights themes of love and friendship, as Big Nutbrown Hare demonstrates the depth of his affection. The charming illustrations by Anita Jeram complement the narrative, making it a favorite for bedtime reading and a cherished classic in children's literature.