Spot: Amanda Seyfried wore Doo.Ri from Fall/Winter 2010 to the "Dear John" gala screening in London

Not every red carpet dress is easy to identify, but seeing Amanda Seyfriend at the London gala screening of "Dear John" (looking very pretty, I might add), there was recognizable factor. In some cases a designer will have a signature runway look, and this combination of navy blue and black belonged to Doo.Ri!

Amanda once again owns her look - simple dark blue tank dress, with front sequin bejeweled embellishment. And if you're thinking the dress looks pretty comfortable, you're probably right. This label is known for jersey and very wearable fabrics.

She completed her look with her signature blonde locks and statement lippy, the orange shade is a nice touch. And as for Doo.Ri, check out the Fall/Winter 2010 runway show, it's a good watch - Amanda's dress appears at 01:29..

Pretty little Amanda Seyfried continues to win me over on the red carpet... sure, she is absolutely gorgeous, but her talk show appearances sealed the deal. There is something very charming & natural about her, which makes her more attractive.

She attended the New York premiere of her new film "Chloe" last night, with co-star Julianne Moore, and this is quite a departure from her usual perky roles. In this psychological thriller, Amanda is hired by Julianne Moore to seduce her cheating husband, so she can confront him. Intense stuff!

ShoppingTheTrend original spot: Amanda is wearing an asymmetric turquoise dress from a collection we know well! RM by Roland Mouret launched his Rainbow collection as an exclusive over at Net-A-Porter, and this turquoise silk dress, the Isa, is one of the major items. More photos of Amanda & links to buy the dress below, both USA & Intl shipping.

We've seen other celebs in rainbow dresses - Holly Willoughby in the orange mini dress, and Laura Bailey in the lemon yellow Osu dress.

Pretty little Amanda Seyfried was on The Late Show with David Letterman last night, and wow, was she ever cute! All doe-eyed and excited to be meeting Dave, she talked about her earlier career as a child model (she was 11 when she got a few catalogue gigs), and her failed attempts at becoming an actress. She was very lovely.. and going back to what I said earlier, yes, "Dear John" will be her break-out role for sure.

And her style is coming along nicely as well.. she's two for two in Giorgio Armani Spring/Summer 2010 (first Armani dress was at Los Angeles premiere of "Dear John").. the runway was lit up with turquoise which is why Amanda's dress looks like a different shade. This is definitely the same dress - and for your quick Friday fashion fix, check out Giorgio Armani's runway show below..

Snaps below.. and all eyes are on this girl now!

Spot: Amanda Seyfried wore Giorgio Armani from Spring/Summer 2010 to the Los Angeles Premiere of "Dear John"

Pretty Amanda Seyfried made a lovely red carpet appearance at the Los Angeles premiere of her new film "Dear John". It's based on the book of the same name by Nicholas Sparks, who also wrote The Notebook. And THAT was the movie that made Rachel McAdams a Hollywood leading lady.

Amanda Seyfried has followed a similar path.. a gorgeous hard-working actress (she was also in Mean Girls!) with some notable performances (Mamma Mia). Could this be her break-out role?

Fashion-wise, it looks like she doesn't need any help as she picked the perfect dress for her premiere - this is Giorgio Armani Spring/Summer 2010, a fabulous shiny blue satin dress with criss cross back. Lovely.