Not only known for gambling, Las Vegas advertises itself as the “Wedding Capital of the World”.

Lightning weddings are legendary, like pop star Britney Spears did many years ago, only to apply for annulment a few days later.

The wedding industry is estimated to bring in around $2 billion a year to the region.

And since Las Vegas is more identified with Elvis Presley than almost any other city, the ceremonies are often performed by an impersonator of the famous singer.

A few weeks ago, for example, reality star Kourtney Kardashian and musician Travis Barker were married by such an actor.

Some of the many wedding chapels in the city have even been named after the "King of Rock and Roll".

The "Elvis Chapel" for example offers several different Elvis packages.

The cheapest currently costs $195, with the impersonator leading the ceremony, singing two songs of the couple's choice and, if desired, leading the bride down the aisle of the chapel to the groom.

Roland Lindner

Business correspondent in New York.

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But these Elvis weddings are now in jeopardy.

Branding and licensing conglomerate Authentic Brands Group (ABG), which owns the Elvis Presley naming rights, has issued cease and desist letters to a slew of the city's wedding chapels, according to a report in the Las Vegas Review-Journal.

The bands have been instructed to stop "unauthorized use" of Elvis Presley within a week or legal action may be taken.

The letter sent "shock waves" through the city's wedding industry, the newspaper described.

A city marketing campaigner was quoted as saying this could deprive many of their livelihoods.

According to the report, at least one chapel has already

ABG has the naming rights to some deceased celebrities, including Elvis Presley, Marilyn Monroe and Muhammad Ali.

The New York-based company also markets live celebrities, including a partnership with soccer star David Beckham earlier this year.

It also has a number of clothing and sports brands under its umbrella, including Reebok a few months ago, which it bought from German sporting goods manufacturer Adidas for $2.5 billion.

Other names from the ABG portfolio include Nautica, Van Heusen and Juicy Couture, as well as sports magazine Sports Illustrated.

ABG bought the Elvis rights in 2013, in the media there was talk of a price of around 125 million dollars.

ABG holds a majority stake of 85 percent in Elvis Presley Enterprises,

It is conceivable that ABG is using the threatening letters to try to pressure wedding chapels in Las Vegas to conclude license agreements.

The maneuver came a few weeks before the theatrical release of star director Baz Luhrmann's eagerly awaited biopic "Elvis".

This film should bring additional attention to the late singer - and perhaps encourage more couples to consider getting married by an Elvis impersonator.