Can't-Miss Celebrity Pics!

It's been a few months since we learned Rachel Bilson is pregnant, and now the mom-to-be's baby bump is seriously showing! The actress showed off her pregnancy glow in LA on Thursday, letting her hair down while running errands. Elsewhere, costars Emma Stone and Joaquin Phoenix let loose off camera, Gisele Bündchen was primed for a good sweat, and James Franco looked ready to find out if blondes really do have more fun. Keep scrolling to see all that and more in this week's can't-miss shots.

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Joaquin Phoenix had Emma Stone laughing on the set of Woody Allen's upcoming movie in Newport, RI, on Thursday.

Getty | Gustavo Caballero

The Giver costars Maity Interiano, Brenton Thwaites, and Odeya Rush took a ride down a giant slide while promoting their new movie in Miami on Thursday.

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Gisele Bündchen looked ready for a workout in Boston on Friday.

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Zoe Saldana hid her baby bump during her Thursday afternoon with husband Marco Perego in LA.

Getty | Alessio Botticelli

James Franco sported blond hair on the set of Michael in Freeport, NY, on Thursday.

Getty | Shareif Ziyadat

50 Cent had a gorgeous view of the NYC sunset at an IntelxSMSAudio BioSport event on Thursday.

Getty | Noam Galai

Tough guys Sylvester Stallone and Kellan Lutz got physical at a DuJour magazine party in NYC on Thursday.

Getty | Brian Ach

On Wednesday, Katie Holmes couldn't help smile while holding a sweet kid at the Marvel Universe Live! premiere in NYC, where children with cancer from Sunrise Day Camp got some one-on-one time with the star.

Getty | Theo Wargo/NBC

Taylor Swift gave a royal wave at The Tonight Show in NYC on Thursday. She looked completely different in her popular "Ew!" sketch with Jimmy.

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Lea Michele got cute with her boyfriend, Matthew Paetz, after feeding their hiking habit in LA on Wednesday.

Getty | Alberto E. Rodriguez

Pierce Brosnan had the support of his handsome sons — Dylan and Paris — when he hit the red carpet at the LA premiere of his new movie, The November Man, on Wednesday.

Getty | GONZALO/Bauer-Griffin

Ali Larter lit up with a big smile on the beach in LA on Wednesday. Last week, the actress announced her second pregnancy on The Tonight Show Starring Jimmy Fallon.

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Demi Lovato flashed a peace sign while making her way through NYC on Thursday.

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Poppy Delevingne showed off her bikini body in Ibiza on Wednesday.

Getty | Eamonn M. McCormack

Prince Harry attended a photocall for the Invictus Games in London on Wednesday.

Getty | Alo Ceballos

Cate Blanchett took a Wednesday stroll through NYC.

Getty | Gustavo Caballero

Kellan Lutz cuddle with an itty-bitty dog on Wednesday, while he was on the Miami set of Despierta America.

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Naya Rivera was a vision in white during her Wednesday errands in LA.

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On Tuesday, Mark Wahlberg and Amanda Seyfried cuddled up on the Boston set of Ted 2.

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Kate Moss enjoyed a Tuesday beach day on her vacation in Spain.

Getty | Ignat/Bauer-Griffin

Jessica Alba added a serious pop of pink to NYC on Tuesday.

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Nicole Kidman headed back to the NYC set of her latest film on Tuesday.

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Jennifer Lopez showed off her legs on Monday in LA.

Getty | Dimitrios Kambouris

Taylor Swift stepped out for the NYC premiere of The Giver on Monday.

Getty | Tim Mosenfelder

Jenny Lewis took the stage on Sunday at the Outside Lands Music and Arts Festival in San Francisco.

Getty | Raymond Hall

On Monday, Kim Kardashian popped up in NYC.

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Kate Mara stepped out in NYC on Monday.

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Britney Spears was positively beaming during her Monday coffee run in LA.

Getty | Ian Gavan

Daniel Radcliffe got cute with his fans at the Tuesday-night premiere of What If in London.

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Taylor Swift showed off her legs after a Tuesday workout in NYC.

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Rachel Bilson's growing baby bump was front and center during her Thursday shopping excursion in LA.