An Ardent Heart (Gorya′chee se′rdtse, Горячее сердце) is a play by Alexander Ostrovsky written in 1858 and first published in the January 1869 issue of Otechestvennye Zapiski. It was premiered on 15 January 1869, at the Moscow's Maly Theatre and then on the 29th of the same month at the Saint Petersburg's Alexandrinsky Theatre.