Who Do You Think You Are

play3:00
Mandy Moore Discovers a Shocking Detail About Her Ancestors on 'Who Do You Think You Are?' (Exclusive)

Mandy Moore Discovers a Shocking Detail About Her Ancestors on 'Who Do You Think You Are?' (Exclusive)

ET exclusively debuts a sneak peek from the 'This Is Us' star's episode, airing Monday, Dec. 3 at 10 p.m. ET/PT on TLC.

play2:16
Hilary Duff Sets Out for Answers Into Her Family History on 'Who Do You Think You Are?' (Exclusive)

Hilary Duff Sets Out for Answers Into Her Family History on 'Who Do You Think You Are?' (Exclusive)

The 'Younger' star traces her family history back to medieval Scotland, discoverying royalty in her lineage and an unbelievable tale of bravery in an all-new episode, airing Monday, June 4 at 9 p.m. ET/PT on TLC.

Megan Mullally Digs Into Her Family's Tragic, Dark History on 'Who Do You Think You Are?' (Exclusive)

Megan Mullally Digs Into Her Family's Tragic, Dark History on 'Who Do You Think You Are?' (Exclusive)

The 'Will & Grace' star talks to ET about discovering the hard truths about her family line.

1