The eighth movie in the franchise, which has been hailed by UK fans as the best Thomas & Friends film to date, will arrive at The Grove next week for a blue carpet premiere.
The date, first revealed by the Thomas & Friends facebook page, was teased by the brand's Twitter earlier this week, encouraging users to tweet during the event.
PBS Kids is to air the feature-length special in the country in October, coinciding with Season 17's launch on the channel.
King of the Railway: The Movie marks its US premiere at The Grove in Los Angeles on September 15th, with its DVD/Blu-ray released on the 17th.
Thanks to Daniel Coffey for the alert.