When we announced it to my parents, we addressed them as grandma and grandpa...they were thrilled.
Take it from a new Dad, cherish this time, and get as much sleep as you can lol.
They are so worth it, but it's not a cliche, sleep will become scarcer...its a fact...so just be prepared.

Be safe all.

Perfection does not exist. The question therefore, is: what level of imperfection are we willing to settle for?