Is your child, a child who had been sleeping throughout the night up until now suddenly active?
This is known as 18-20 mo old sleep regression. Treat it as a night waking; do not get your child out of bed. Offer something to drink (milk, water, etc) check/change the diaper. If the baby is really ready to start the day, you have 2 options: give some toys and keep them in their bed or in a playpen in your room until you're ready to get up, or, you can opt to start your day when the baby gets up.