Rob Lowe can’t wait to be a grandfather, but has some specific demands about what his grandchildren will call him. However, Rob admitted there are a few nicknames he’s determined not to be called. He added: “I don’t need to get ahead of myself, but I’m very focused on not being called Grandpa. Among the options are “Papa Rob”, he admitted, and he previously said that while his granddaughter is too young to call him anything as yet, “American doesn’t need Grandpa Rob Lowe”. But as he waits for more grandchildren, Rob is keeping himself busy with one project after another.