die is cast, the

the die is cast

A course of action has been finalized. This expression comes from a Latin phrase thought to have been said by Julius Caesar when he crossed the Rubicon river and became embroiled in civil war in 49 BCE. Well, the die is cast now that we've closed on the house—we're officially homeowners!
See also: cast, die

die is cast, the

The decision or course of action has been determined and cannot be changed. For example, Now that I've announced my resignation, the die is cast. This expression comes from the Latin Iacta alea est, "the dice have been thrown," which according to Suetonius was said by Julius Caesar when he crossed the Rubicon and invaded Italy in 49 b.c. In English it dates from the first half of the 1600s.
See also: die