The campaign, created by Fallon, also features outdoor, press and online activity. Media planning and buying was through Vizeum, while glue London handled the online activity.
The film was shot by Joaquin Baca-Asay and focuses on the lavish refurbishment of the 140-year old terminal.
Laurence Green, Fallon's chairman, said: "The move to St Pancras is a seminal moment for Eurostar. We're unashamedly bathing in the station's beauty to underscore a new era for travel."
The project to restore the station cost almost £6 billion, making it one of the largest construction projects in UK history.