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, actress Christina Applegate solves the mystery of her grandparents' estrangement and must give her father the heartbreaking news.

First look at Julie Bowen on Who Do You Think You Are?.

Kelsey Grammer takes a trip into the past to explore his beloved grandmother's family, and along the way, uncovers the story of a woman haunted by demons and a family that risked everything.

Kelsey Grammer portrayed the urbane psychiatrist Frasier Crane on TV for years, but incredibly, the actor has a connection to the dusty Oregon Trail. Watch this recap for more on Kelsey's family history.

Who Do You Think You Are? premieres Sundays at 9/8c.

Who Do You Think You Are is back with new celebrities discovering their family histories. The new season begins Sunday, April 3 at 9/8c.

In this episode recap, supermodel Cindy Crawford learns that her Midwestern family can be traced back to an early English settler in New Haven -- and she's got a royal connection that leaves her in shock!

After actress Julie Bowen finds out that her ancestor became a prominent figure of the American Protective League during WWI she connects it back to current affairs today.

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

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

Actress Julie Bowen reads a document describing how her ancestors fought to end slavery, and how their actions relate back to today.

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.

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.

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