Fans of the hugely popular BBC drama Call the Midwife have been given a massive season 14 update and shown a backstage picture.

The popular programme shared a behind-the-scenes photo of the actors on set and said that filming was only a few weeks away from ending.

The image posted to Instagram shows Nurse Crane (Linda Bassett), Shelagh Turner (Laura Main) and Sister Monica Joan (Judy Parfitt) filming a scene in a church.

In the photograph, Nurse Crane can be seen gesturing with her little finger as if she is about to make a pinky promise about something, according to The Sun.

Call the Midwife shares massive season 14 update with fans of the BBC show

The caption for the post read: "The Autumn nights are closing in here at Call the Midwife, and that means there are just a few weeks of filming left on Series 14 before we start the engines on our countdown to the new Christmas Special!!

"The team have been filming in our much-loved church location in London, and they've sent us this intriguing behind-scenes shot.

"What is Nurse Crane up to with that little finger of hers? Does she have a promise to make with her co-stars Laura Main and Judy Parfitt? And will it involve cake?"

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The BBC show added: "There's very much a feeling of approaching the finishing line on set, and then comes the best part – showing you what we've been up to!

"The year is now 1970 – the world has changed in many ways, but the babies keep coming, and the need for the Nonnatuns is still all too obvious."

Concluding, the programme said: "1970 in Poplar will be bringing you all the joy, tears, warmth, humour and heartache you'd expect from our community. Pinky promise!"

All Call the Midwife episodes can be watched on-demand via BBC iPlayer.