Amy Adams

Character: Louise Banks

Jeremy Renner

Character: Ian Donnelly

Forest Whitaker

Character: Colonel Weber

Michael Stuhlbarg

Character: Agent Halpern

Mark O'Brien

Character: Captain Marks

Tzi Ma

Character: General Shang

Abigail Pniowsky

Character: 8-Year-Old Hannah

Julia Scarlett Dan

Character: 12-Year-Old Hannah

Jadyn Malone

Character: 6-Year-Old Hannah

Frank Schorpion

Character: Dr. Kettler

Lucas Chartier-Dessert

Character: Private Lasky

Christian Jadah

Character: Private Combs

Lucy Van Oldenbarneveld

Character: CNAC Anchor

Andrew Shaver

Character: Environmental Tech

Pat Kiely

Character: Environmental Tech

Sonia Vigneault

Character: Dr. J. Bydwell

Mark Camacho

Character: Richard Riley

Sabrina Reeves

Character: Press Secretary

Julian Casey

Character: Australian Scientist

Tony Robinow

Character: British Scientist

Larry Day

Character: CIA Officer Dan Ryder

Matthew Willson

Character: Preacher

Ruth Chiang

Character: Chinese Scientist

Russell Yuen

Character: Chinese Scientist

Sergiy Marchenko

Character: Russian Officer

Anana Rydvald

Character: Swedish Scientist

Bineyam Girma

Character: Sudan Representative

Abdelghafour Elaaziz

Character: African Representative

Abdul Ayoola

Character: Sierra Leone Representative

Alex M. Yeuh

Character: Japanese Minister

Daniel Esteban

Character: Venezuelan Representative

Albert Kwan

Character: Chinese Man

Brittany Teo

Character: Student with Smartphone

Joe Cobden

Character: Cryptographer

Lorne Brass

Character: Cryptographer

Genevieve Sirois

Character: Cryptographer

Victor Andres Trelles Turgeon

Character: Science Team Member

Michael Nangreaves

Character: Science Team Member

Reda Guerinik

Character: Communications Operator

Adrien Benn

Character: Communications Operator

Sasha Samar

Character: Communications Operator

Kathleen Stavert

Character: Communications Operator

Kattia Thony

Character: Nurse

Leisa Reid

Character: Nurse

Brent Skagford

Character: Lieutenant

Gurdeep Ahluwalia

Character: Soldier

Shawn Campbell

Character: TV Anchor

Brian Dunstan

Character: TV Anchor

Dan Duran

Character: TV Anchor

Lori Graham

Character: TV Anchor

Orla Johannes

Character: TV Anchor

John Sanford Moore

Character: TV Anchor

Sangita Patel

Character: TV Anchor

Hal Roberts

Character: TV Anchor

Camille Ross

Character: TV Anchor

Ola Sturik

Character: TV Anchor

Tammie Sutherland

Character: TV Anchor

Max Walker

Character: TV Anchor

Marc-André Goulet

Character: Motion Capture Heptapod

Paul-Antoine Taillefer

Character: Motion Capture Heptapod

Martin Jr Pelletier

Character: Motion Capture Heptapod

Carmela Nozza Guizzo

Character: 4-Year-Old Hannah (uncredited)

Robert D. Morais

Character: Master Sergeant Douglas (uncredited)

Mustafa Haidari

Character: Foreign Correspondent (uncredited)

Philippe Hartmann

Character: Halpern's Deputy Director (uncredited)

Laurean Adrian Parau

Character: US Army Major (uncredited)

Nathaly Thibault

Character: Gala Guest (uncredited)

Leslie Baker

Character: Middle Aged Woman (uncredited)

Dave Campbell

Character: Soldier (uncredited)

Alexander Da Mota

Character: Venezuelan Military (uncredited)

Akul Dang

Character: Pakistani Scientist (uncredited)

Frank Fiola

Character: Soldier (uncredited)