Who Do You Think You Are? is an American genealogy documentary series which premiered on NBC on March 5, 2010.

Viewers are invited to take an up-close and personal look inside the family history of some of today's most beloved and iconic celebrities with NBC's "Who Do You Think You Are?" Starring in the new alternative series are Matthew Broderick, Lisa Kudrow, Spike Lee, Sarah Jessica Parker, Susan Sarandon, Brooke Shields and Emmitt Smith. Ancestry.com is NBC's official partner on the series.

From Executive Producer Lisa Kudrow ("Friends," "The Comeback") -- in conjunction with her production company Is or Isn't Entertainment and the U.K.'s Wall to Wall productions, "Who Do You Think You Are?" is an adaptation of the award-winning hit British television documentary series. The seven-episode program will lead celebrities on a journey of self-discovery as they unearth their family trees that reveal surprising, inspiring and even tragic stories that are often linked to crucial events in American history.

From the California Gold Rush to the Salem witch trials, from European aristocracy to the beaches of Africa, and from the Civil War to the Holocaust, "Who Do You Think You Are?" will reveal the fabric of humanity through everyone's place in history. Each week, a different celebrity takes a journey into their family's past, traveling all over the world. Viewers are given an in-depth look into their favorite stars' family trees, and each episode will expose surprising facts and emotional encounters that will unlock people's emotions -- showing just how connected everyone is not only to the past, but to one another.

"Who Do You Think You Are?" is produced by Wall to Wall productions (a Shed Media Company) in association with Is or Isn't Entertainment. Alex Graham and Lucy Carter from Wall to Wall and Lisa Kudrow, Dan Bucatinsky and Don Roos from Is or Isn't Entertainment are the executive producers. Bryn Freedman is the co-executive producer. The unique, award-winning series is based on the popular BBC television documentary series created and executive-produced by Alex Graham.

Wall to Wall is an Emmy Award-winning producer of factual and drama programming. Recently voted one of the seven "Most Creative" production companies in the world by Real Screen Global 100 List, Wall to Wall is best known in the U.S. for the breakout reality formats "Frontier House" and "Colonial House." Is or Isn't Entertainment has been developing and producing television for the last five years, producing the critically acclaimed and Emmy-nominated series "The Comeback."

Episode
	Ashley Judd Ashley Judd's paternal great grandmother was a larger than life character who told tall tales. Her journey will lead her to an ancestor who served in the Union Army and faced tragedy on the battlefield. Rumors of ancestral ties to New England uncover an incredible connection to the first settlers of the New America.	April 8, 2011
	Gwyneth Paltrow As Academy Award-winning actress Gwyneth Paltrow traces the roots of her beloved paternal grandfather, a man driven to succeed in the face of adversity, she uncovers a string of events that give her insight into her great grandmother's character. On her mother's side, Paltrow discovers that her ancestors have deep roots in the Caribbean island of Barbados.	April 1, 2011
	Steve Buscemi Actor Steve Buscemi travels through New York, Philadelphia and the battlefields of Virginia and discovers a questionable character among his ancestors. Steve Buscemi has built a career out of portraying some of the most unique and unforgettable characters in recent cinema.	March 25, 2011
	Lionel Richie Singer Lionel Richie charts his family history by focusing on his maternal grandmother's ancestry. Determined to solve mysteries surrounding her father, Richie takes an investigative voyage from Alabama to Nashville and Chattanooga, ultimately digging up a connection to the dawning days of the civil-rights movement.	March 4, 2011
	Kim Cattrall Kim Cattrall was born on August 21, 1956, in Mossley Hill, Liverpool, England. At the age of three months, emigrated with her father, Dennis, and mother, Shane, to Canada, where a large number of her films have been made. At the age of eleven, Kim returned to her native country and studied at the London Academy of Music and Dramatic Art.	February 25, 2011
	Rosie O'Donnell By appearing on an episode of "Who Do You Think You Are?," Rosie O'Donnell found that discovering the truth about her ancestors helped her modern-day family heal - but why?	February 18, 2011
	Tim Mcgraw The country music superstar uncovers his father's heritage among the Founding Fathers. At the same time, "Who Do You Think You Are?" celebrates the twists and turns of a great nation and the people who made their way here in search of freedom and opportunity.	February 11, 2011
	Lisa Kudrow It was a tough journey for actress Lisa Kudrow. On tonight's episode of Who Do You Think You Are?, Lisa returned to the place where members of her family - her great-grandmother included - had been murdered in the Holocaust. But she ends on a high note: a reconnection to an ancestor Lisa and her father had believed was long dead.	February 7, 2011
	Vanessa Williams As someone who has made history on her own, Vanessa Williams ("Desperate Housewives") sets out on a journey to find out if her ancestors were also trailblazers. Her search leads her to the National Archives in Washington, D.C. and to South Carolina where she finds ancestral ties to the Civil War’s Union Army. She also heads to the South and discovers an ancestor who was an educator in a time when many African-American southerners did not have the opportunity to receive an education.	February 4, 2011