<Tr> <Th> Website </Th> <Td> www.bbc.co.uk/programmes/b03h4107 </Td> </Tr> <Tr> <Th> Production website </Th> <Td> www.redproductioncompany.com </Td> </Tr> <P> Last Tango in Halifax is a British comedy - drama series on BBC One . First broadcast on 20 November 2012, twenty episodes have aired . Screenwriter Sally Wainwright loosely adapted the story of her mother's second marriage . Starring Derek Jacobi and Anne Reid as Alan and Celia, former childhood sweethearts, who are now in their seventies . Reunited via Facebook, they meet, fall in love, and plan to marry . Reid and Jacobi enjoyed having the chance to play out a love story between older people . Sarah Lancashire and Nicola Walker star as Caroline, Celia's daughter, and Gillian, Alan's daughter, respectively . Other characters are played by Nina Sosanya, Tony Gardner, Ronni Ancona, Dean Andrews, Sacha Dhawan and Josh Bolt . </P> <P> The United States broadcast television network PBS picked up the first series and began airing it in September 2013 . The series has been praised for its depiction of the older generation, strong acting, and believable dialogue . A critic for The Daily Telegraph summarised the series as "a triumph against TV's ageism", and it has been endorsed by an executive member of the charity Age UK . Ahead of the American premiere, a critic for the Los Angeles Times described it as "the best new show of the fall". Last Tango in Halifax accrued four nominations for the 2013 British Academy Television Awards and won the British Academy Television Award for Best Drama Series . </P>

Who plays celia in last tango in halifax