Although the acclaimed miniseries also features small roles from likes of Jimmy Fallon, James McAvoy, and Michael Fassbender, the Tom Hardy Band of Brothers appearance is usually the one that takes audiences by surprise the most. Hardy is a British actor, best known for his role as the titular Marvel character in the Venom movies and for starring as both of the Kray twins, Ronnie and Reggie, in the gangster film Legend. The Tom Hardy Band Of Brothers role was quite small compared to his later work but memorable nonetheless, standing out in the war series in the short time he had on screen.

https://screenrant.com/tom-hardy-band-brothers-debut-role-character-janovec/