Call the Midwife will return in 2012 for a Christmas special on BBC1.
Having become the BBC’s most successful new drama of the past decade, the show was re-commissioned just two episodes in to its first series. However, fans were expecting to have to wait until 2013 for a new series of the 50's drama which follows the fortunes of a group of nursing nuns in East London.
BBC's drama controller Ben Stephenson said: "Following its huge success, we simply couldn't resist treating audiences to a Call the Midwife special this year - our Christmas present for all BBC1 viewers."
While plot details are yet to be announced, executive producer Pippa Harris hinted at the content of the seasonal special, saying: "As the nights draw in and Christmas approaches, the residents of Nonnatus House pull together to celebrate the season in their own very special way.
"Christmas celebrates one particular birth, and so it's especially fitting for BBC1 to pay a visit to these much-loved characters, whose daily lives revolve around the joys and tribulations of childbirth."
Call the Midwife, which stars Miranda Hart, Jenny Agutter and Pam Ferris, completed its first run of six episodes in February 2012.