Scarlett Johansson Natasha Romanoff / Black Widow Florence Pugh Yelena Belova Rachel Weisz Melina David Harbour Alexei Ray Winstone Dreykov Ever Anderson Young Natasha Scarlett Johansson Natasha Romanoff / Black Widow Florence Pugh Yelena Belova Rachel Weisz Melina David Harbour Alexei Ray Winstone Dreykov Ever Anderson Young Natasha Violet McGraw Young Yelena O-T Fagbenle Mason William Hurt Secretary Ross Olga Kurylenko Antonia / Taskmaster Ryan Kiera Armstrong Young Antonia Liani Samuel Lerato Michelle Lee Oksana Lewis Young Scientist Morocco 1 C.C. Smiff Scientist Morocco 2 Nanna Blondell Ingrid Simona Zivkovska Widow Erin Jameson Widow Shaina West Widow Yolanda Lynes Widow Claudia Heinz Widow Fatou Bah Widow Jade Ma Widow Jade Xu Widow Lucy-Jayne Murray Widow Lucy Cork Widow Eniko Fulop Widow Lauren Okadigbo Widow Aurélia Agel Widow Shawarah Battles Widow Tabby Bond Widow Madeleine Nicholls Widow Yasmin Riley Widow Fiona Griffiths Widow Kurt Yue Ross Lieutenant Liran Nathan Mechanic Martin Razpopov Tattoo Gulag Inmate Olivier Richters Ursa Dawid Szatarski Red Room Scientist 1 Robert Pralgo Ross Agent Jacinte Blankenship Ross Agent Kalina Vanska Commuter (uncredited) Joakim Skarli Russian Soldier (uncredited) Daniel Joseph Woolf Gulag Inmate #120 (uncredited) John Wolfe Guard (uncredited) Obie Matthew Prison Riot Guard (uncredited) Stephen Samson KGB (uncredited) Julia Louis-Dreyfus Contessa Valentina Allegra de Fontaine (uncredited) Jeremy Renner Clint Barton / Hawkeye (voice) (uncredited)