John & Keith Urban To Perform Thursday At The Red Nose Day Charity Event On NBC

"Fun-raising" event to help lift children out of poverty in the U.S. and abroad

Coldplay to premiere 'Game Of Thrones: The Musical' featuring TV cast members

John Mellencamp and Keith Urban to perform "Pink Houses"

Blake Shelton, Jack Black and Michelle Rodriguez will shed light on those in need with trips in the U.S., Uganda and Peru

More stars are joining NBC's star-studded charity event "Red Nose Day" on Thursday (8-11 p.m. ET) to have fun, raise money and change the lives of children living in poverty in the U.S. and in some of the poorest communities around the world.

Richard Gere, Jimmy Fallon, Jennifer Garner, Keith Urban, John Mellencamp, One Direction, Zac Efron, Helen Mirren, Robert Pattinson, Liam Neeson, Rose Byrne and Nick Cannon will appear, along with Matt LeBlanc, Hugh Bonneville, Dame Diana Rigg, Kyle MacLachlan, Elisabeth Moss, "Saturday Night Live" cast members (Jay Pharaoh, Colin Jost and Michael Che), Hoda Kotb, Gilbert Gottfried, Cheryl Burke, Nicole Scherzinger, Jeff Dye and Australian comedy sketch trio SketchShe.

A sketch film documenting the creation of "Game Of Thrones: The Musical," written by Coldplay and featuring a number of the HBO show's cast members, will be one of the many highlights on "Red Nose Day," along with John Mellencamp and Keith Urban performing "Pink Houses."

A popular event in the U.K. that has raised more than $1 billion for charity over the past 30 years, "Red Nose Day" is coming to America for the first time. In addition to comedy, videos produced by Funny Or Die, music performances and almost 100 of Hollywood's favorite stars, the benefit event will feature short appeals films that shed light on those in need.

Jack Black travelled to Africa to visit children in Uganda living on the streets, witnessing firsthand the devastating effects of preventable diseases at a hospital. Blake Shelton visited a mobile health clinic in Los Angeles that is providing free, life-changing care to underprivileged children. In Peru, Michelle Rodriguez met children having to work to survive and saw how projects there are helping them get the education they need.

Nick Cannon will appear on the special after attempting to dance for 24 hours straight with "Red Nose Day Danceathon with Nick Cannon," kicking off the night's festivities and streaming live on beginning Wednesday.

Previously announced stars slated to appear in the special include Julia Roberts, Will Ferrell, Jennifer Aniston, Reese Witherspoon, Julianne Moore, Jodie Foster, Neil Patrick Harris, Christina Aguilera, Pharrell, Adam Levine, Paul Rudd, Benedict Cumberbatch, Eddie Redmayne, Anna Kendrick, Simon Cowell and many more.