Ronald Eaglesham Porter, known professionally as Ron Donachie, is a Scottish actor. He is known for starring as DI John Rebus in the BBC Radio 4 dramatisations of the Ian Rankin Rebus detective novels and for his supporting roles in films The Jungle Book (1994), Titanic and television series Doctor Who and Game of Thrones.

The Inspector Rebus books are a series of detective novels by the Scottish author Sir Ian Rankin. The novels, centred on Detective Inspector John Rebus, are mostly based in and around Edinburgh. They are considered an important contribution to 'Tartan Noir'.