Transatlantic Sessions is the collective title for a series of musical productions by Glasgow-based Pelicula Films Ltd, funded by- and produced for BBC Scotland, BBC Four and RTÉ of Ireland. The productions comprise collaborative live performances by various leading folk, bluegrass and country musicians from both sides of the North Atlantic, playing music from Scotland, Ireland, England and North America, who congregate under the musical direction of Aly Bain and Jerry Douglas to record and film

Katharine Hepburn and Cary Grant are two performers closely associated with the Transatlantic accent. Accent expert Erik Singer explains how this was an aspirational form of speech for people in the '30s and '40s. See the TCM Original piece here: https://youtu.be/XlBE4C5DBpE | Turner Classic Movies: TCM