Kate Middleton and Prince William Also Known As 'Mr and Mrs Smith'

The Duke and Duchess of Cambridge have reportedly been known to employ the alias of Mr and Mrs Smith.

The royal couple attempted to go incognito when they returned from their three week royal tour to Australia and New Zealand

Even Prince George took on the alter ego and was listed as Baby Jones on the Qantas jet at Sydney airport where they boarded the flight home.

However, trying to travel under cover can't be the easiest thing for the young royals who are followed by a posse of photographers everywhere they go.

Booking the entire first-class section of the Qantas jet as they checked in with 90 bags might also lead you to believe this was no ordinary Mr and Mrs Smith.

A source told The Sun: "It was funny that they used such common British names. Even Prince George was Baby Jones. But it did seem a bit daft as everyone knew it was them."

It's not the first time Prince William and Kate have tried to avoid the media glare using the common British name.

In 2009, they booked a holiday home in Cornwall in the names of Mr and Mrs Smith for William's 27th birthday getaway.

The royals are not the only high-profile people to travel using a fake name.

When checking into a hotel, singer Fergie reportedly uses the famous Beatles song title Penny Lane.

Lyndsay Lohan goes by Bella Lovelace, while Disney characters are a popular alias with Kim Kardashian choosing Princess Jasmine and Paris Hilton checking in as Tinkerbell.