A third series of Last Tango in Halifax is to be made next year.
The BBC production won a BAFTA in May for best drama series.
Sir Derek Jacobi and Anne Reid star as teenage sweethearts reunited 60 years later through Facebook. Sarah Lancashire and Nicola Walker play their daughters.
The final episode of series two was screened in Britain on Christmas Eve, with Celia and Alan renewing their marriage vows.
''Series three will be a whole new emotional ball game," said writer Sally Wainwright, whose other credits include Scott & Bailey.
The first series has been broadcast on the PBS network in the United States.