Akademik

Дело сделано
The harm is done, it is too late to prevent the undesirable
Cf: The damage is done (Am., Br.). The fat is in the fire (Am., Br.). The game is lost (Am.). The game is up (Br.). It's all up! (Am.). The milk is spilled (Br.)

Русско-английский словарь пословиц и поговорок. . 2013.