Mariam Petrosyan was born in 1969 in Yerevan, Armenia. In 1989 she graduated with a degree in applied arts and worked in the animation department of Armenfilm movie studio. In 1992 she moved to Moscow to work at Soyuzmultfilm studio, then returned to Yerevan in 1995. The Gray House is Petrosyan's debut novel. After working on it for eighteen years, she published it in Russia in 2009, and it became an instant bestseller, winning several of the year's top literary awards, including the Russian Prize for the best book by a Russian author living abroad. The book has been translated into French, Spanish, Italian, Polish, Czech, Hungarian, and Lithuanian. In interviews Petrosyan frequently says that readers should not expect another book from her, since, for her, The Gray House is not merely a book but a world she knew and could visit, and she doesn't know another one. Petrosyan is married to Armenian artist Artashes Stamboltsyan. They have two children.