Who’s on Who Do You Think You Are? tonight? Latest celebrity on the BBC One series

Tonight's Who Do You Think You Are? - is it new or a repeat?
Who Do You Think You Are? programme logo

Who Do You Think You Are? is back on BBC One tonight – here’s all you need to know.

The genealogy show has aired since 2004 and features a star studded line-up from the worlds of TV, sport, music, comedy and dance.

In each episode, a celebrity traces their family tree with a host of names having signed up to explore their ancestry over the years.

Vicky McClure, on Who Do You Think You Are?

Who’s on Who Do You Think You Are? tonight?

Tonight (15 August) features actor Vicky McClure

Vicky McClure goes on an emotional journey to Taiwan to find out what happened when her great-grandfather was captured as a prisoner of war in World War II.

The episode airs on Wednesday, 15 August at 9PM on BBC One.

It’s the first brand new episode from series 21.

Watch Who Do You Think You Are? online

As well as watching on TV you can watch episodes online as they air via the BBC iPlayer.

You can also watch online and stream past series on catch up via the BBC iPlayer with 50 episodes currently available.

They include the full last series which featured Andrew Lloyd Webber, Chris and Xand van Tulleken, Bear Grylls, Emily Atack, Kevin Clifton, Dev Griffin, Claire Foy, Chris Ramsey and Lesley Manville.

Past series have featured the likes of Oscar-winning actress Kate Winslet, Harry Potter actor Daniel Radcliffe, music manager and former X Factor judge Sharon Osbourne, James Bond actress Naomie Harris and reality star turned TV presenter Mark Wright.