Star Tracks: Thursday, September 11, 2014

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GAME ON

Looks like he's got it! Hugh Jackman and Jimmy Fallon roll along in New York Wednesday night on The Tonight Show, where the stars played a game of life-size pool.

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STREET CHIC

Hi there! Katharine McPhee makes waves outside the Late Show with David Letterman's New York City studio, where she promoted her upcoming CBS series, Scorpion, on Wednesday.

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STYLISH STEPS

She arrived during a windy rainstorm, but that doesn't dampen Keira Knightley's smile at the Wednesday premiere of her new movie, Laggies, during the Toronto International Film Festival.

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BROTHERLY BONDING

Inside joke, perhaps? Prince William and Prince Harry share sly smiles in London on Thursday morning during a service before the athletic events of Harry's Invictus Games.

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SIBLING REVELRY

Together again after their time on SNL, Kristen Wiig and Bill Hader link up Wednesday night for the premiere of their upcoming film, The Skeleton Twins, in Los Angeles.

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NOW YOU SEE THEM …

Relax, guys! James McAvoy and Jessica Chastain get chummy on the red carpet at Wednesday's Cinema Society screening of their movie, The Disappearance of Eleanor Rigby, held at New York's Landmark Sunshine Cinema and hosted by The Weinstein Company and Prada.

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SHE'S RED-Y

Leave it to Gwen Stefani to glam up a simple sweater-and-jeans outfit with a metallic purse and her signature red lip while running errands Wednesday in Los Angeles.

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WHAT A WAIST!

This is how to steal the spotlight! America's Got Talent judge Mel B. wears a figure-hugging top and leather-and-leopard skirt on the post-show red carpet Wednesday in New York City.

09 of 25

THEY'VE GOT MOVES?

Ramey

So, uh, what's happening here? Robert De Niro and Anne Hathaway look just slightly confused on Wednesday while filming scenes for their movie The Intern in Brooklyn, New York's Prospect Park.

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SING THING

Pharrell Williams gets down – literally! – while performing in London on Wednesday night at the iTunes Festival.

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LETTER PERFECT

They've got "it"! Naomi Campbell and Dakota Fanning strike a demure pose at a party to celebrate the It Girls of W magazine, featuring the two stylish stars, held at the Peninsula Hotel's Clement restaurant Wednesday in N.Y.C.

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MARITAL BLISS

Casey Wilson is flanked by costars Ken Marino and Tim Meadows on Wednesday while talking up their TV show, Marry Me (which is written by Wilson's new husband David Caspe), at PaleyFest in Beverly Hills.

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DIAL UP

Guess Samuel L. Jackson left his cell at home! The actor chats on a vintage phone – check out that cord! – while participating in the BGC Global Charity Day, in remembrance of the 9/11 attacks, at BGC Partners in London on Thursday.

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ON THE LINE

Participating in a similar event across the pond in New York City on Thursday, Rooney Mara answers phones at BGC Partners, a subsidiary of Cantor Fitzgerald, a financial services firm that lost nearly two-thirds of its employees in the 9/11 attacks. Each year on the anniversary, the firm donates its revenues to charitable causes with a little help from the stars.

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PAIRING OFF

Top Chef's Padma Lakshmi and Michael J. Fox – along with a bevy of other celebrities – join Mara in BGC Partners' efforts on Thursday.

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GREEN MACHINE

Mark Ruffalo's fans give a nod to his The Hulk character – and his work for environmental causes – outside of the Infinitely Polar Bear premiere at the Toronto International Film Festival on Wednesday.

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HOLDING POWER

Jennifer Garner goes casual to a business lunch in Brentwood, California, on Wednesday.

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FOLLOWING SUIT

Portia de Rossi channels her inner businesswoman in Los Angeles on Wednesday while filming scenes for her guest role on Scandal.

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COLOR THEM CONFIDENT

Also at Fashion Week: Miley Cyrus and designer Jeremy Scott, who make a vivid twosome on the runway during his Wednesday show at Spring Studios.

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MAKE YOUR MARK(ER)

Have pen, 'Will' sign! Ferrell comes prepared to give his autograph as he arrives for a Wednesday ceremony honoring his work at the Deauville American Film Festival in France.

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RUNNING AWAY

Nikki Reed, sans , stays in tune while pounding the pavement on a Wednesday jog in Los Angeles.

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READY TO ROLL

Nice ride! Idris Elba makes a grand entrance to Prince Harry's Invictus Games Wednesday at Queen Elizabeth Olympic Park in London.

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BRIGHTEN UP

Honest Company founder Jessica Alba strikes a pretty pose Wednesday while unveiling the Honest Ultra Clean Room, a place to study environmental causes of diseases in children, at New York's Mount Sinai Hospital.

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