From the front, the dress looked almost like a nurse's Halloween costume. But from the back, the dress was revealed to be held together three white ties—kind of like, you know, a hospital gown.

NICU nurse Clarissa Jayma tells us the babies love the clicking sound the camera makes and the nurses delight in watching their sweet reactions, making the photo shoot an enjoyable experience for all.

But it's not all nuns' habits and blue nursing uniforms for the cast of the hit BBC series. Away from the show, Helen George Megan Cusack, Jenny Agutter and their co-stars couldn't look more different ...