The dog and trainer, who won this year's competition in May, have made more than £1 million after securing prize money and signing several lucrative deals.
In addition to the £500,000 Britain's Got Talent prize money, the animal has gone on to secure a book deal that, while originally estimated to be worth £100,000, is now reportedly estimated at £350,000.
The duo have also signed on to appear in a Christmas panto which will earn them more than £150,000, reports The Mirror.
"Ashleigh and Pudsey are now millionaires thanks to this book deal and hopefully it is just the beginning. The book will be an autobiography, or an autobidography, as it is being dubbed. It will be out in December for Christmas and will tell the story of how Pudsey became such an amazing performing dog," a source told the publication.
"The pair also have a panto deal and are heading out to America this month for chat show appearances, including a slot on the hugely popular Jay Leno show that could make them global stars."
Butler was recently rumoured to be joining the next season of Strictly Come Dancing.
Watch Ashleigh Butler talking to Digital Spy below: