If you run into Prince William and Kate - or Prince George - during their 18-day sojourn in Australia and New Zealand, don't lose your head - or refer to the Queen as "your grandma".
Should you happen to come into royal contact, UK etiquette expert William Hanson, author of The Bluffer's Guide To Etiquette, has some tips to help you act more like a toff.
"Being common is so 2013," says Hanson, who describes himself as "24 going on 54" and "a teacup and saucer in a world of mugs".
"For 2014, it's all about good manners, being polite to the person who just pushed in front of you in the queue, and knowing how to greet the Queen properly when you do meet her."
The royals' schedule is busy, but the couple are likely to mingle with locals at dinners, events, fetes and shows.