Documentary films are nonfictional movies that document some aspect of reality, generally for educational or historical purposes. Below are some documentary films about twins. Listing these documentaries here does not imply recommendation or endorsement by the Washington State Twin Registry.
Twinsters (2015)
Imagine discovering an identical twin you never knew existed on the other side of the world. Incredible story of discovery and sisterhood.
Power of Two
Inspired by their 2007 memoir, “The Power Of Two” offers an intimate portrayal of the bond between half-Japanese twin sisters Anabel Stenzel and Isabel Stenzel Byrnes, their battle with the fatal genetic disease cystic fibrosis (CF) and miraculous survival through double lung transplants. Defying all odds, Ana and Isa have emerged as authors, athletes and global advocates for organ donation, and their connection to the CF and transplant communities provides rare insight into the struggles – and overlooked joys – of chronic illness.
In the Womb: Identical Twins
The latest installment of National Geographics popular franchise In the Womb follows the embryonic and fetal journey of one of nature’s most fascinating reproductive miracles identical twins. Witness the key moments during early embryogenesis from the spontaneous splitting of a single fertilized egg into identical twins through to the major milestones of twin fetal development, ending with their dramatic births.
Red Without Blue 
RWB follows a pair of identical twins as one transitions from male to female. Captured over a period of three years, the film documents the twins and their parents, examining the Farley’s struggle to redefine their family. Through candid and extensive interviews with the twins and their family, RED WITHOUT BLUE recounts troubled times, interweaving the twins’ difficult past with their efforts to find themselves in the present. Through its portrayal of these articulate and independent twins, each haunted by the painful experiences of their adolescence, the film questions normative standards of gender and identity as Mark and Clair reassert their indescribable bond as identical twins.
National Geographic: In the Womb – Multiples
In the Womb, National Geographic explores the extraordinary and fragile world of twins, triplets and quadruplets in utero. Featuring amazing 4-D ultrasound images and revolutionary new fetal imaging techniques, this remarkable new special travels inside the womb to witness tiny fetuses as they grow and begin to interact with each other.