Maryna and Serhiy Dyachenko
 Spouses Maryna Yuryevna Dyachenko and Serhiy Serhievich Dyachenko (rus. Марина и Сергей Дяченко ukr. Марина та Сергій Дяченки) are Russophone Ukrainian co-authors of fantasy literature. They write in Russian but also often publish their books in Ukrainian. The Dyachenkos hail from Kiev and currently reside in Moscow Russia.