So what will Saoirse wear on Oscars night?
So what is Saoirse going to reach into the wardrobe and take out on Sunday night?
Speculation is rife but Saoirse, like her name suggests, has and exerts the freedom to move her love across the brand spectrum.
And no doubt, she has made herself some Barry's Tea - just like she sent to the Hollywood Foreign Press Association (HFPA) judging the Golden Globes - and drank all the options on offer.
Lately, Saoirse's been mixing it up, spreading her daytime and evening selections across a wide spectrum of labels, from Antonio Berardi in cool blue with beaded embellishment to a Michael Kors Collection lace column dress in palest pink (pictured).
Saoirse's daytime suits have come from Hilfiger and from Laura Basci, a Swiss haute couture tailor based in Los Angeles who delivers flawless fits on countless red carpet events and has handmade original looks for celebrities like Angelina Jolie.
International press have fallen in love with Saoirse's "fairy" style, intrigued by her ability to mix it up. In their Oscars fashion debate, InStyle magazine speculated that she might pull an Irish or English designer card out of the bag on the night.
And if she does, my money is on it being Simone Rocha because a bespoke piece by the 29-year-old Dubliner would be just perfect, delivering all the ingredients that Saoirse likes: ethereal, classic and above all, feminine.
There's gossip, too, that she might look to English designer, Stella McCartney.
My gut feeling is that her US stylist will stick to their agenda of streamlined pastel colours.
As Elizabeth Satzman told Vogue: "Saoirse gravitates toward what's good for Saoirse."