Passive voice: omission of object

#1 He will divorce his wife sooner or later.

Passive Voice: His wife will be divorced (by him) sooner or later.

Here we can omit mentioning the object "by him" as it obvious wife can only be divorced by her husband. It is general case.

But

#1 Pitt will divorce his wife sooner or later.

Passive voice 1: His wife will be divorced by Pitt sooner or later.

OR Passive voice 2: His wife will be divorced sooner or later.

Here we have mentioned the name of specific person "Pitt". So in that case should we omit the object "by pit" or not? Here it is specific case.

There could be another version: Pitt's wife will be divorced sooner or later. Is this correct passive?

Thank you