Neeson narrated the 2001 documentaries Journey into Amazing Caves, a short film about two scientists who travel around the world to search for material for potential cures, and The Endurance: Shackleton's Legendary Antarctic Adventure.
The latter won awards at a number of film festivals including Best Documentary from both the Chicago Film Critics Association and the National Board of Review.
After being nominated for a Tony Award for his role opposite Laura Linney in The Crucible, Neeson appeared with Harrison Ford in Kathryn Bigelow's 2002 submarine thriller K-19: The Widowmaker as Captain Mikhail Polenin.
He was also on the cast of Martin Scorsese's Gangs of New York with Leonardo DiCaprio, Brendan Gleeson, Cameron Diaz and Daniel Day-Lewis, and played a recently widowed writer in Richard Curtis's ensemble comedy Love Actually (2003).
His role as Alfred Kinsey in Kinsey again put Neeson up for nomination for a Golden Globe Award, but he lost to Leonardo DiCaprio for The Aviator.

In 2004, Neeson hosted an episode of the NBC sketch show Saturday Night Live.
He starred as a redneck trucker, Marlon Weaver, in an "Appalachian Emergency Room" sketch and as a hippie in a one-off sketch about two stoners (the other played by Amy Poehler) who attempt to borrow a police dog to find their lost stash of marijuana.
Despite vowing not to play any Irish stereotypes, Neeson did play a stereotypically Irish man named Lorcan McArdle in the home makeover show parody "You Call This A House, Do Ya?"

In 2005, Neeson played Godfrey of Ibelin in Ridley Scott's epic adventure Kingdom of Heaven; Ra's al Ghul, one of the main villains in Batman Begins; and Father Bernard in Neil Jordan's adaptation of Patrick McCabe's novel Breakfast on Pluto.
In The Simpsons episode "The Father, the Son, and the Holy Guest Star" (2005), he voiced the kindly priest who (briefly) converts Bart and Homer to Catholicism.
That same year, he gave his voice to the lion Aslan in the blockbuster fantasy film The Chronicles of Narnia: The Lion, the Witch and the Wardrobe.
In 2007, he starred in the American Civil War epic Seraphim Falls.

Neeson voiced the main character's father, James, in the video game Fallout 3.
Executive producer Todd Howard said, "This role was written with Liam in mind, and provides the dramatic tone for the entire game".
Fallout 3, the third game in the Fallout series, was extremely well received by critics and shipped 4.7 million copies by the end of 2008, the year it was released.

In the director's commentary of the 2007 Transformers DVD, Michael Bay said he had told the animators to seek inspiration from Neeson in creating Optimus Prime's body language.
Neeson appeared as Alistair Little in the BBC Northern Ireland/Big Fish Films television drama Five Minutes of Heaven, which tells the true story of a young Protestant man convicted of murdering a Catholic boy during The Troubles.
Neeson narrated the 2001 documentaries Journey into Amazing Caves, a short film about two scientists who travel around the world to search for material for potential cures, and The Endurance: Shackleton's Legendary Antarctic Adventure. The latter won awards at a number of film festivals including Best Documentary from both the Chicago Film Critics Association and the National Board of Review. After being nominated for a Tony Award for his role opposite Laura Linney in The Crucible, Neeson appeared with Harrison Ford in Kathryn Bigelow's 2002 submarine thriller K-19: The Widowmaker as Captain Mikhail Polenin. He was also on the cast of Martin Scorsese's Gangs of New York with Leonardo DiCaprio, Brendan Gleeson, Cameron Diaz and Daniel Day-Lewis, and played a recently widowed writer in Richard Curtis's ensemble comedy Love Actually (2003). His role as Alfred Kinsey in Kinsey again put Neeson up for nomination for a Golden Globe Award, but he lost to Leonardo DiCaprio for The Aviator.
In 2004, Neeson hosted an episode of the NBC sketch show Saturday Night Live. He starred as a redneck trucker, Marlon Weaver, in an "Appalachian Emergency Room" sketch and as a hippie in a one-off sketch about two stoners (the other played by Amy Poehler) who attempt to borrow a police dog to find their lost stash of marijuana. Despite vowing not to play any Irish stereotypes, Neeson did play a stereotypically Irish man named Lorcan McArdle in the home makeover show parody "You Call This A House, Do Ya?"
In 2005, Neeson played Godfrey of Ibelin in Ridley Scott's epic adventure Kingdom of Heaven; Ra's al Ghul, one of the main villains in Batman Begins; and Father Bernard in Neil Jordan's adaptation of Patrick McCabe's novel Breakfast on Pluto. In The Simpsons episode "The Father, the Son, and the Holy Guest Star" (2005), he voiced the kindly priest who (briefly) converts Bart and Homer to Catholicism. That same year, he gave his voice to the lion Aslan in the blockbuster fantasy film The Chronicles of Narnia: The Lion, the Witch and the Wardrobe. In 2007, he starred in the American Civil War epic Seraphim Falls.
Neeson voiced the main character's father, James, in the video game Fallout 3. Executive producer Todd Howard said, "This role was written with Liam in mind, and provides the dramatic tone for the entire game". Fallout 3, the third game in the Fallout series, was extremely well received by critics and shipped 4.7 million copies by the end of 2008, the year it was released.
In the director's commentary of the 2007 Transformers DVD, Michael Bay said he had told the animators to seek inspiration from Neeson in creating Optimus Prime's body language. Neeson appeared as Alistair Little in the BBC Northern Ireland/Big Fish Films television drama Five Minutes of Heaven, which tells the true story of a young Protestant man convicted of murdering a Catholic boy during The Troubles.
Liam Neeson