Mischa Barton gets a near-royal procession at the kickoff of Harrods summer sale. Photo: Mike Marsland/WireImage

Living in London, I find that my city's people -- a generally unenthusiastic bunch -- occasionally make a big fuss over things we Americans take for granted. Most recently: deep discounts and Mischa Barton. (Seriously, she is so big here, she even has her own collection of handbags, in addition to her line of headbands.)

So it's fitting that The Harrods summer sale (or more accurately, Harrods' only sale of the year) was opened by the British-born/American-bred actress, who cut the red ribbon and rode around in Harrods' horse-drawn carriage to get the crowds pumped for the iconic store's hotly anticipated shopping event. (It's big: Lanvin dresses are 50 percent off.)

Sixties style icon Penelope Tree. Photo: Getty Images

But perhaps more newsworthy is how Barton nailed it, style-wise. Her looks are often hit-or-miss, but right now, I give her serious props for channeling the style spirit of another British/American fashion plate, Penelope Tree.

Like Barton, in her heyday, Tree was willowy with crazy-angular cheekbones, worked long bangs, copious amounts of eye makeup and possessed a cool, boho chic style.

Let's hope Barton's style evolution continues on its upward path. Love it!