According to TMZ, producers for the US singing competition asked if the dancing dog act would perform on the show's finale, which takes place next Tuesday (May 22) and Wednesday (May 23).
However, it is reported that the offer was turned down as the duo are too busy since their BGT win earlier in the month to fit in the commitment.
The website also states, however, that Ashleigh & Pudsey will be making their way to New York and Los Angeles for other major TV appearances, and will be meeting with several producers during their trip.
Britain's Got Talent judge Simon Cowell has also vowed to fly the teenager and her dog to LA on his private jet after lining up a series of auditions for movie roles.
The act are reportedly being tapped to appear on the next series of Big Brother as part of a dog-training task.
Watch Ashleigh Butler talk about taking Pudsey to Hollywood below: