The lovebirds are said to be reuniting on the set of a new thriller, London Fields, based on the 1989 novel by Martin Amis. The Pirates of the Caribbean actor will have a small (and most likely memorable) cameo in the production.
The film stars Amber Heard as Nicola, a psychic who knows she will be murdered soon, and Billy Bob Thorton as Sam, a terminally-ill writer with whom she has a sordid relationship.
Co-stars also include actors Theo James and Jim Sturges.
Johnny, 50, and his 27-year-old girlfriend met on the set The Rum Diary in 2011 and have been officially dating since June 2012, shortly after Johnny and the mother of his two children, Vanessa Paradis, ended their 14-year relationship.