DC Entertainment president Geoff Johns confirmed the casting in an interview with The Wall Street Journal. Manganiello is best known for his roles in True Blood, Magic Mike and Sam Raimi’s Spider-Man trilogy.
Affleck, who is directing and starring in the next Batman movie, recently shared a short clip of Manganiello in his Deathstroke costume on Twitter.
— Ben Affleck (@BenAffleck) August 29, 2016
Deathstroke, an assassin with superhuman strength, speed and agility, first appeared in comic book form in 1980 but did not cross paths with Batman until a 1991 comic.
Fans have been speculating that Deathstroke will first appear in DC Comics’ Justice League, currently shooting in London. Johns however declined to comment on the rumours.
Affleck’s first solo outing as the caped crusader is reportedly due for release in 2018.