Style Star: Jennifer Aniston

Jennifer Aniston can effortlessly switch between casual and chic, looking amazing while lounging by the pool in a string bikini, or dazzling in haute couture on the red carpet. Jen turned heads yet again this weekend at “The Bounty Hunter” London red carpet premiere where she showed off miles of her toned legs in a silver Valentino Couture mini with Jimmy Choo “Lance” sandals, winning her the honor of Access’ newest Style Star.

In the cool London weather, Jen covered the metallic strapless dress with a form-fitting black blazer, and accessorized with starburst diamond earrings that were hidden by her stylish haircut of layered straight blonde locks.

When Jen transforms from her casual beach look to high fashion threads, she is often a Valentino girl.

This silver strapless is reminiscent to the long-sleeved silver Valentine Couture mini that Jen wore on the red carpet last September for the premiere of the romantic comedy “Love Happens” with Aaron Eckhart, for which she earned rave reviews. And who can forget the stunning silver Valentino gown that Jen wore to the 2009 Oscars alongside date John Mayer, where she came face-to-face with ex-husband, Brad Pitt?

And, of course, for years, Jen was known for her iconic “Rachel” haircut during her run on “Friends.” In an Access AH Nation poll, our readers voted “The Rachel” the 2nd most popular hairdo of all time (after Farrah Fawcett’s “The Flip”).

Jen, who just celebrated her 41st birthday in February, continues to prove that age is just a number.

Access Hollywood’s Billy Bush, who exclusively interviewed Jen at her birthday extravaganza in Cabo San Lucas, Mexico, asked how she felt turning 41. Jen joked that they don’t say the number out loud so Billy playfully asked how turning 31 felt.

“Thirty-one, pssh. It’s quite lovely I have to say,” Jen teased. “30 was a hump but you know 31 is fabulous. It really does get better doesn’t it?”

When the topic turned to fellow birthday weekend guest Gerard Butler, who stars with Jen in the action comedy “The Bounty Hunter,” Jen said that they had a great time working together.

“We just had so much fun together you know. He’s just fun. Gerry’s the most unpretentious guy,” Jen explained. “He’s a guys guy, but he’s absolutely the most lovely and sort of self-deprecating and just what you see is what you get. We look at work the same way… we always had each other’s back.”