Tell Me Who I Am is a 2019 documentary film directed and produced by the British filmmaker Ed Perkins. It focuses on twin brothers Alex and Marcus Lewis. Alex lost his memory in a motorcycle accident at age 18, and his twin brother Marcus helps him reconstruct their childhood memories. The film explores their journey of rediscovery and the challenges they face as they come to terms with their past. The documentary is based on a 2013 book written by the twins together with Joanna Hodgkin.

The film was commissioned by and aired on Netflix. It received acclaim from critics after its release and was described as "harrowing" and "involving but upsetting".