Hollywood is full of women named Mary who have three names. These women often confuse me. Perhaps they confuse you as well. In case they do, I present a handy primer.
1. Mary Stuart Masterson is a blonde actress, best known for playing Idgie in Fried Green Tomatoes and Joon in Benny & Joon. She is not Mary Elizabeth Mastrantonio, with whom I confuse her due their names.
2. Mary Elizabeth Mastrantonio is an actress with dark curly hair. She is best known for playing Maid Marian in Robin Hood: Prince of Thieves (she was also in Scarface, for the more cinematically pure-hearted). She is neither Mary Stuart Masterson nor Mary Steenburgen, who also has dark curly hair but does not have three names, and played the mom on Joan of Arcadia.
3. Mary-Louise Parker is a dark-haired actress who plays Nancy on Weeds and previously was Amy on The West Wing. She is none of the Mary's above, nor is she Lauren Graham, who played Lorelai on The Gilmore Girls and is not a Mary, but does resemble Mary-Louise Parker. She's also not Julia Louie-Dreyfus, who played Elaine on Seinfeld and looks nothing like her, but as a Louie in her name.
4. Mary-Kate Olsen is one of the Olsen twins. Clearly, she is not her sister, Ashley Olsen. She is the Olsen twin who had the anorexia issues a few years back, who sometimes does not have blonde hair. She is also the Olsen twin who did a guest appearance on Weeds.
5. Mary Tyler Moore is the iconic star of The Mary Tyler Moore Show in the 1970s. Yep, the one who threw her hat up in the air. I don't get her mixed up with anybody.
6. Mary Kay Place is the actress who plays Adaleen on Big Love. She's been around a long time, and was on Mary Hartman, Mary Hartman in the 70s. I don't mix her up with any of the other Marys, but do sometimes get her confused with Debra Jo Rupp, who played Kitty on That 70's Show.
7. Mary Beth Evans is a long time soap opera actress. She's played Kayla on Days of Our Lives since 1986 and has simultaneously been on As The World Turns, Port Charles, and General Hospital. She is sort of the epitome of soap actress (besides Her Highness Susan Lucci, of course).
There are, of course, countless other three-named Marys. However, these are the best-known ones, and the ones I am mostly likely to confuse. I hope this has been edifying.