Medical drama Call the Midwife has been renewed for two more series, the BBC has confirmed.
The award-winning drama, which pursues a gathering of midwives in London's East End in the 1960s, will presently be on the air until at least 2022.
The previously announced series nine will start filming in a matter of seconds, the BBC said.
Series 10 and 11 will contain eight episodes as well as the usual Christmas specials.
Its storylines have regularly secured contentious issues.
Heidi Thomas, creator, writer and executive maker of the series, said: "Even after all these years, it still feels as though Call the Midwife has more truth to tell, more tears to cry, more life to celebrate, and more love to give.
"We are blessed with the best cast, crew, and audience a show could wish for, and I could not be more excited about our future."
Charlotte Moore, director of BBC content, said the corporation was "delighted" to have expanded "such an exceptional show."
Call the Midwife has won plaudits for tackling such issues as female genital mutilation, natural fissures and palates, and sickle cell disease.
Last year's festive special wound up the most-watched program overall on Christmas Day, once on-demand figures were taken into account.
ITV also confirmed the Inspector Morse prequel, Endeavor starring Shaun Evans, would be returning, as the sixth series came to an end on Sunday.
Also, Brenda Blethyn will return as DCI Vera Stanhope for the tenth series of ITV's Vera in 2020.