First there is simmering anger, affairs, etc..
Then there is the obligatory "couples therapy"-that is usually the nail in the coffin of the marriage. That's for the regular folks.
("We tried sooooo, sooooo, sooo very hard. We went to therapy-it just didn't work.")
Hollywood tends to bypass the Therapy Stage because they are in so much therapy already and totally wasted, so they goright to Marriage Vow Renewal.
When the Marriage Vow Renewal planning starts, the high powered divorce lawyers are already on retainer.
I give this 6 months.