<Dd> For the UK series of the same name, see Who Do You Think You Are? (UK TV series). </Dd> <P> Who Do You Think You Are? is an American genealogy documentary series that is an adaptation of the British BBC series of the same name . In each episode, a different celebrity goes on a journey to trace parts of his or her family tree . </P> <P> The show premiered on NBC on March 5, 2010 where it ran for three seasons before being cancelled in 2012 . It was then picked up by TLC, where it has aired for six additional seasons . In August 2017, TLC renewed the series for a tenth season that is set to premiere on May 21, 2018 and feature Hilary Duff, Jean Smart, Jon Cryer, Laverne Cox, Megan Mullally, and Molly Shannon . </P> <P> Lisa Kudrow is an executive producer for the series, which is a partnership between Shed Media, NBC Entertainment and Ancestry.com . </P>

When does who do you think you are return in 2018