No, you are under no obligation to do so. Most couples don’t.
If invited and it’s not too busy of a weekend, Rev. Phil may go. He enjoys getting to know your family and friends.
IF you invite Rev. Phil to your reception, please do NOT seat him at the vendors’ table. They’re nice people – but still working. Rev. Phil is not. So, he spends most of the evening alone. Some vendor dinners are served in a different room – so he would not hear any toasts or see any first dances. Seat him with family (he loves to hear background stories) or friends.