From the Catechism of the Catholic Church:

2384 Divorce is a grave offense against the natural law. It claims to break the contract, to which the spouses freely consented, to live with each other till death. Divorce does injury to the covenant of salvation, of which sacramental marriage is the sign. Contracting a new union, even if it is recognized by civil law, adds to the gravity of the rupture: the remarried spouse is then in a situation of public and permanent adultery ...

2385 Divorce is immoral also because it introduces disorder into the family and into society. This disorder brings grave harm to the deserted spouse, to children traumatized by the separation of their parents and often torn between them, and because of its contagious effect which makes it truly a plague on society.

2386 It can happen that one of the spouses is the innocent victim of a divorce decreed by civil law; this spouse therefore has not contravened the moral law. There is a considerable difference between a spouse who has sincerely tried to be faithful to the sacrament of marriage and is unjustly abandoned, and one who through his own grave fault destroys a canonically valid marriage.

Not to worry! Celebrity covers a multitude of sins over at Walter Scott's Personality Parade, where Edward Klein answers a question about the marital history of Jane Wyman:

Oscar-winner Wyman, who died at age 90 in 2007, was married five times: Reagan was her third husband. Despite her divorces, she was a devout Catholic and eventually became a lay member of the Dominican Order.