From Bogie and Bacall's wedding rings to Freddie Mercury's art collection

A first edition of The Great Gatsby and Roger Moore's Lamborghini skis also up for auction in London and Hollywood

One of the matching 14-carat gold wedding rings exchanged by Humphrey Bogart and Lauren Bacall in May 1945 at Julien's.

Freddie Mercury's baby grand owned by Freddie Mercury, the matched wedding rings of Bogie and Bacall, a first edition of The Great Gatsby from the collection of Charlie Watts and Roger Moore’s Lamborghini skis are among an extraordinary collection of celebrity stuff soon to come up at blockbuster sales in London and Hollywood.

Collectibles like these are big business. With fans everywhere and global auction access online, the business is growing exponentially.