Kate Hudson chose a sexy white Alexander McQueen gown for her Toronto International Film Festival premiere this evening. She showed off The Reluctant Fundamentalist with fiancé Matthew Bellamy by her side after also posing with him on the carpet at the Venice Film Festival last week. Kate's costars Kiefer Sutherland and Riz Ahmed, as well as the film's director, Mira Nair, were on hand today as well. They're just the latest stars to descend on TIFF after Kristen Stewart, Emily Blunt, Ben Affleck, and others took their turns in the spotlight in the past few days. Make sure to check out all the stars at TIFF as the fun continues next week.

Jennifer Lawrence, in a dramatic Dior Couture gown, and Bradley Cooper teamed up in Toronto to show off Silver Linings Playbook at the city's film festival tonight. It was Bradley's second red carpet at the event after premiering The Place Beyond the Pines with Ryan Gosling yesterday. Jennifer made an appearance at that screening as well to show her support for her costar. She's sporting darker hair for her role as Katniss in the second installment of The Hunger Games, which she'll start filming next week. Sam Claflin was recently added to the cast, as was Jeffrey Wright.

Gwyneth Paltrow joined her Thanks For Sharing costars Mark Ruffalo, Tim Robbins, Josh Gad, and Patrick Fugit on the red carpet at the Toronto International Film Festival tonight. She accented her black dress with red animal-print heels to pose for the cameras. Gwyneth made the trip up north after popping up in LA for the annual Stand Up to Cancer telethon yesterday. She not only attended the event but was also an executive producer. Gwyneth talked about how losing her father to cancer changed her habits and made her take another look at her own health — see all the other stars that participated in Stand Up to Cancer's big fund-raising night here!

The TIFF fun didn't stop after the Argo red carpet in Canada yesterday as stars gathered to celebrate the film at a postpremiere bash. Ben Affleck, who stars in and directed the movie, had wife Jennifer Garner by his side, but she wasn't the only show of support. Their pals Matt and Luciana Damon as well as Emily Blunt and John Krasinski gathered for the big night after Emily and John attended a screening of Looper on Thursday. Matt may have been up North, but he also lent his famous face to the Stand Up to Cancer telethon with a prerecorded message that played during the event back in LA. Jennifer's good friend and one of the stars of Argo, Victor Garber, was also on hand, as was Nina Dobrev. There's been lots of excitement at the Toronto Film Festival already, and there's still more to come as we bring you the latest straight from the scene!

Nicole Richie and Camila Alves came out to celebrate Macy's Glamorama 30th anniversary event in LA last night. Nicole had husband Joel Madden by her side, while pregnant Camila showed off her bump solo on the red carpet. Robin Thicke was on hand to perform at the event, and Sharon Stone took the stage as well. Sharon chatted with us on the carpet about how AIDS prevention is a big cause for her, and Nicole talked about heading to NY Fashion Week on Monday. Camila, meanwhile, connected the evening's AIDS cause to husband Matthew McConaughey's latest role, for which he's lost almost 30 pounds.

Keira Knightley chose a stunning and sheer black Elie Saab gown for her big TIFF premiere of Anna Karenina on Friday evening. She didn't pose with a date, but she did have her leading men Jude Law and Aaron Taylor-Johnson along for the big red-carpet event and afterparty. Buzz reviewed Anna Karenina from the festival and was blown away by the adaptation of the famous Russian novel. Keira once again teamed up with her Atonement and Pride and Prejudice director Joe Wright for Anna, and she is once again earning praise and award season buzz for her performance. In fact, the film got a standing ovation after the screening. Jude, Keira, Aaron, and the rest of their cast retreated to The Soho House to celebrate the occasion.

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It was a huge week for the stars, who were busy popping up at screenings, attending film festivals, and hitting the pool in bikinis all over the globe. Kristen Stewart struck a pose for her On the Road premiere at the Toronto Film Festival, while a bikini-clad Jennifer Lopez went for a dip with her daughter, Emme, in Miami. Beyoncé and Jay-Z shared a sweet kiss during their family getaway to the South of France, and Blake Lively linked up with Salma Hayek at a Gucci party during the Venice Film Festival. Many more celebrities joined in the fun this week, so be sure to check out the rest of the exciting pics!