Bert V. Royal's script which hints of Nathaniel Hawthorne's The Scarlet Letter but its script is more like the Academy Award winning Juno script. It is light, funny, sharp, snappy and filled with off-hand irony.
Olive the center of the Scarlet A is carried out delightfully by Emma Stone. She plays a young woman who has sufficient confidence to withstand all the looks and gossip her high school can muster. Part of that strength comes from two not quite traditional parents (Stanley Tucci and Patricia Clarkson) that support her decision to laugh at the whispering behind her back and straight honesty from her mother. Mom admits she was the target of loose woman talk when she was young because it was true.
The trend by Olive begins in her eight grade time, Olive played by Juliette Goglia in middle school agrees to leave the spin-the-bottle private room covering for her partner by lying about a kiss which did not occur. Carry this to her high school days and she finds herself helping all manner of guys who want the world to think they have gotten to at lease one of the bases with her. Olive doesn't care what the mean jealous girls think she just helps the guys with their reputations.
As the situation gets out of hand Olive moves to face book to tell her story and we learn the truth about everyone as she describes her actions and the actions of a number of her high school male friends and a few who are not friends. It's her confidence and the well written script that make her red A stand out placing the audience clearly on the side of this bright competent Olive who makes what is usually serious in films something to laugh about.
While one scene reminds us of When Harry Met Sally, and the potential risque situations are obvious they are not obnoxious, the laughs come without the vulgarities because they are genuine and truly comical.
With a bright, entertaining and enjoyable script we follow Olive to a reasonable, if off center conclusion which is very satisfying.