Melanie Griffith is set to co-star in ABC’s untitled Molyneux comedy pilot (formerly The Brainy Bunch), from Imagine TV and 20th TV. The single-camera project, written/executive produced by Wendy & Lizzie Molyneux, is inspired by the book by Kip and Mona Lisa Harding. Through a combination of genetics and dynamic home schooling, Kip and Mona Lisa Mitchell find themselves raising extraordinarily intelligent kids. Griffith will play Mona Lisa’s mom Celeste, a former pageant…