Joan is the name of Jimmy Kimmel's mom, the baby's great-grandmother. In his opening monologue, Jimmy Kimmel described being a grandfather as a "big responsibility," going on to share some of the funny things he saw his own grandfathers do, including one giving himself haircuts using a cigarette lighter.

Now we know what it takes for Jimmy Kimmel to skip a night of work: One of his babies has to have a baby. Kimmel became a grandfather earlier this week when his oldest daughter gave birth to a girl. In his monologue Tuesday,