[den81]

My dad keeps talking about a movie where these four married couples are all going to get a divorce for various reasons. One couple are in a television show within the movie who are also married on the show and another couple are wealthy. The wealthy couples wife is like Anna Nicole Smith who is going to take all of his money. It ends up that none of the couples are legally married and the greedy wife faints in the courtroom. He cannot remember any of the actors names.

[ddelaine]

My dad keeps talking about a movie where these four married couples are all going to get a divorce for various reasons. One couple are in a television show within the movie who are also married on the show and another couple are wealthy. The wealthy couples wife is like Anna Nicole Smith who is going to take all of his money. It ends up that none of the couples are legally married and the greedy wife faints in the courtroom. He cannot remember any of the actors names.

I'm not completely sure but it sounds like it may be "The Women".Joan Crawford, Rosalind Russell, Joan Fontaine... possibly anyway.

[MystMoonstruck]

We're Not Married (1952)
IMDb review:
Letters are sent to five couples telling them that, through a technicality, they're not really married. In the opening sequence, we hear the letter dictated. At the appropriate point in each installment, the letter is introduced with a special musical theme, and the reader of the letter reacts appropriately.. . Though one suspects that Fred Allen had a hand in the writing of his sequence~a parody of radio breakfast couples (with Ginger Rogers as his partner)~the satire is a little too obvious, their banter being merely a string of not especially clever product plugs (one of them having the miracle ingredient of chicken fat).
Louis Calhern rises above the heavily ironic divorce-lawyer skit, and James Gleason gives one of his finest performances as a hick hustler promoting Marilyn Monroe in a fledgling Mrs. America contest.. . The final sequence is the most successful because of the fine, unaffected performances of Janet Gaynor and Eddie Bracken. A point of interest in the film as a whole is how much attitudes about marriage have changed since the film was made.

We're Not Married! (1952) - IMDb

Here's the movie trailer:
We're Not Married! 1952) Trailer - YouTube