Long Lost Family is an American documentary television series based on the Dutch series Spoorloos created by broadcaster KRO-NCRV that premiered on March 6, 2016, on TLC. Presented by Chris Jacobs and Lisa Joyner, the show helps provide aid to individuals looking to be reunited with long-lost biological family members. The show is produced by Shed Media for TLC, and is co-sponsored by Ancestry.com, which provides family history research and DNA testing to help make discoveries possible.

The show follows the original British series very closely, offering a chance for people who are desperate to find long lost relatives. The series helps a handful of people, some of whom have been searching in vain for many years, find the family members they are desperately seeking. It explores the background and context of each family's estrangement and tracks the detective work and often complex and emotional process of finding each lost relative before they are reunited. With the help and support of Chris and Lisa, each relative is guided and supported through the process of tracing the member of their family they have been desperately seeking.^[1]

The original British program began airing in 2011 and has so far distributed nine seasons. It is hosted by Davina McCall and Nicky Campbell.

There is also a Norwegian version of called Sporløs that has been airing on Norwegian channel TV 2 since 2010 with six seasons so far.

An Australian version of Long Lost Family, hosted by Chrissie Swan and Anh Do, began airing around the same time as the U.S. version in 2016,^[26] but was canceled by 2017.