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The publication reports that there will also be two new additions to the second season - Call The Midwife star Dorothy Atkinson, who will play Diana Brompton, and The Vicar Of Dibley star James Fleet, who will play Colonel Merrick.
Channel 5 renewed the All Creatures Great and Small reboot for a second series after its debut drew in a record five million viewers, with fans praising the series for its re-imagining of the Yorkshire vet Herriot.
Role: The Miranda actress, 74, will take over the role of Mrs Pumphrey for series two of the Channel 5 show (Diana Rigg pictured as Mrs Pumphrey)