Welcome to cruise-chat, eyeblazy...and a Bon Voyage for your upcoming N. Star cruise.
Yes, as bacardi300 said, you will have priority embarkation. What that means actually varies depending on the embarkation port, but you are often directed to a separate line. BTW, you will also have priority disembarkation where you will most likely meet in a separate lounge and be the first group called. For a list of other perks for NCL penthouses, click here