1 of 15
Natalie Portman happily waves hello to fans Wednesday while arriving to the Late Show with David Letterman studio in New York, where the actress chatted about her new superhero flick, Thor: The Dark World.
2 of 15
3 of 15
4 of 15
HITTING A HIGH NOTE
A dapper Justin Timberlake leaves the ladies swooning as he kicks off his "20/20 Experience" world tour Wednesday at Brooklyn's Barclays Center.
5 of 15
He got lucky! A suited-up Pharrell Williams and Versace-clad Gisele Bündchen celebrate the Wall Street Journal's Innovator Awards on Wednesday evening in New York.
6 of 15
LOVE IS IN THE AIR
Careful there! Jenny McCarthy delicately autographs a balloon at the launch of Moschino Loves Disaronno at N.Y.C.'s The Westway on Wednesday.
7 of 15
Even without the bright blue kicks, it'd be hard not to notice the handsome Gerard Butler, who makes strides down a Beverly Hills street on Wednesday.
8 of 15
Look this way, Leo! DiCaprio is all about the friendly-yet-smoldering stare at a party celebrating TAG Heuer Carrera Watches' 50th anniversary Wednesday at Pavillon Vendôme in Paris.
9 of 15
NO HOLDING BACK
Jessica Chastain can't hide her delight at the "Evening with Karl Lagerfeld" tribute Wednesday at N.Y.C.'s Lincoln Center, where the actress interviewed the Chanel creative director during a chat that benefited performing arts programs.
10 of 15
11 of 15
WHERE THERE'S A WILL ...
Will Ferrell puts his signature style to work handing out autographs to fans before a Wednesday screening of Anchorman: The Legend of Ron Burgundy at the Vienna International Film Festival, which also paid tribute to Ferrell's long movie career.
12 of 15
HEAR HE IS!
Clothes are apparently optional – we're not complaining! – at Wednesday's launch party for Monster Headphones, where a buff and barely dressed Tyson Beckford listens in at The Ivy in Sydney.
13 of 15
14 of 15
HIP HIP HOORAY!
After surviving another round of Dancing with the Stars eliminations earlier in the week, a relaxed Jack Osbourne goofs off before heading into a Hollywood dance studio on Wednesday.
15 of 15
Where's Samantha? AnnaSophia Robb shows some love to an adorable pooch on the N.Y.C. set of her series, The Carrie Diaries, on Wednesday.
Which Stars Made a Difference at Saturday's We Can Survive Concert? We Have the Pics!
Kerry Washington Says There's a 'Few Things I Wanna Get off My Chest' in Emotional Twitter 'Rant'
Caitlyn Jenner Is ‘Trying to Be a Good Mom’ to Kim Kardashian West After Robbery
Star Tracks: Scarlett Johansson Goes Pop, Plus Katy, Will & More
Wild and Big Little Lies Costars Reese Witherspoon and Laura Dern Reunite for a Girls' Lunch