David Haig will play PM Jim Hacker, Henry Goodman will be Permanent Secretary Sir Humphrey Appleby, and Chris Larkin Principal Private Secretary Bernard Woolley. All three will be reprising their roles from the recent theatrical production, on which the series will be based.
The original show ran for 16 episodes over two series between 1986 and 1988 on BBC TV. Six 40-minute episodes of the new series are to be produced by BBC In-House Comedy for the digital channel Gold and all of them will be written by the TV series' original authors, Antony Jay and Jonathan Lynn.
Also signed up to appear in the new TV series are Zoe Telford, playing political adviser Claire Sutton, and - as a guest star in an episode about Scottish devolution - Robbie Coltrane.
The casting announcements were made by UKTV, of which Gold is part, at a TV showcase held at the Saatchi Gallery in London. The new series will air next year.