There should almost certainly be a comma after script, and I'm not sure you can really say of a script that it stars anyone—but that, I'll acknowledge, is really just nitpicking.
What goes beyond nitpicking* is the comma after woman. What they want is a comma after who: Goldie Hawn is "a woman who struggles with being single again," and she does so "after her husband has a mid-life crisis at the age of 65 and leaves her." The problem with putting the comma after woman is not only that the sentence becomes nonsense when it hits the word struggles, but also that the thrust of its meaning now appears to be that Goldie Hawn plays a woman: "Star is writing the script starring Goldie Hawn as a woman." OK, I'm hooked! Go on!
When Martin Lawrence or Tyler Perry plays a woman, that may be remarkable. Goldie Hawn, not so much. (The difference, if you're wondering, is that she's white.)
|This fall, watch this talented young man in|
his most challenging role yet: a woman?!?!
* It is still nitpicking.