The new season of Who Do You Think You Are? premieres Monday, May 21 at 9/8c only on TLC.

Actress Liv Tyler discovers a musician in her line of ancestors.

Get a first look at actress Liv Tyler’s journey.

Actor John Stamos meets with modern Greek historian Katerina Lagos where he learns that his paternal grandfather is listed as an orphan at only age 13.

Actor John Stamos discovers his paternal great-grandfather was murdered in a village in Greece.

Get a first look as actor John Stamos digs into his family history.

Smokey Robinson continues to learn about the surprising path of his maternal grandfather.

Get a first look at Smokey Robinson’s journey of exploring his family history.

First look at Jessica Biel’s journey of learning about her ancestry.

Noah Wyle learns the truth about the demise of his ancestor.

Noah Wyle discovers his ancestor fought in the Battle of Shiloh, one of the bloodiest battles of the Civil War.

A first look at actor Noah Wyle's journey to learn more about his family history.

Jennifer Grey’s ancestors travel to the U.S.

Jennifer Grey discovers her grandfather was a conscientious objector.

Jennifer Grey explains how she remembers her grandfather

Get a first look at Jennifer Grey’s journey on Who Do You Think You Are?

In this episode recap, country music superstar Trisha Yearwood discovers the surprising reason why her distant relative Samuel Winslett came to America.

Aisha Tyler's journey reveals an ancestor who, as a politician, struggled to keep his illegitimate son a secret.

In this episode recap, actress Cynthia Nixon processes shock, grief, then pride as she learns of her ancestor's surprising role in prison reform.

Get a first look at Jennifer Grey’s journey on Who Do You Think You Are?

Tracing his patriotic roots, Scott Foley finds a relative who risked his life for one of America's founding fathers, and an ancestor who suffered unspeakably during one of this nation's darkest times.

Jennifer Grey discovers her grandfather was a conscientious objector.

Aisha Tyler learns more details about the time in which her 2x great grandfather lived from an 1865 Galveston, Texas newspaper.

In this episode recap, actor Jesse Tyler Ferguson is bitterly disappointed to learn his great-grandfather was a hustler. He travels to the Klondike to find out if his last great business risk paid off -- and restored his name.

In this episode recap, actress Rachel McAdams and her sister Kayleen trace their mother's side of the family tree to discover two fascinating relatives: a Victorian footman in England and Revolutionary loyalist in the American colonies.

Jennifer Grey’s ancestors travel to the U.S.

Aisha Tyler learns more about her great grandfather Hugh Hancock from an old newspaper article.

When Julie Chen visits her great-grandfather's grave and notices the beautiful view it commands, a historian explains that graves were ordered by principles of feng shui.

Julie Chen studies a map with a historian to understand how complex her grandfather's mission was when he began shipping supplies to help China during World War II.

With her distant relative and a translator, Julie Chen visits the house owned by her great-grandfather and sees the place where her grandfather was born.

Scott Foley visits George Washington's HQ in Cambridge.

Jennifer Grey explains how she remembers her grandfather