Movie star and frequent Oscar host Billy Crystal just became a grandfather, and that has become the occasion for him to sign a two-book deal for a pair of children's books with Kate Morgan Jackson, editor-in-chief of HarperCollins Children's Books. She signed with Byron Preiss Visual Publications, which will be producing them, and with MBST Entertainment on behalf of the star. First up will be I Already Know I Love You, a picture book about the birth of Crystal's first grandchild, illustrated by Elizabeth Sayles, to be published next April; the second will be another illustrated book.