Hall got an offer for a small part in The Best Man, a comedy film.
The actress and director, 50, opted for a bandeau top and knee-length shorts for her outing.
In the latest episode, Jeremy Irons' character Adrian Veidt asked his servants, Tom Mison's Mr Phillips and Ms Crookshanks Sara Vickers to recreate a play about Doctor Manhattan.
Regina, who plays tough-as-nails outlaw Trudy Smith in the movie, modeled a black sequined mini dress for all it was worth.