Leonardo DiCaprio and longtime best friend Tobey Maguire headed out on a boat together in Sydney today. The buddies are costarring in the Baz Luhrmann 3D remake of The Great Gatsby together, which means months together in Australia where they are shooting. Tobey's family, wife Jennifer Meyer, and their two kids were along for the yachting adventure. Leo and Clint Eastwood are on the October GQ cover together to promote their project J. Edgar. In between his films, Leonardo is still making time for his romance with Blake Lively. The two are taking their Summer romance into the Fall, and we'll see if it has staying power amidst stories that they remain completely smitten since getting together in the Spring.

Sienna Miller and Tom Sturridge stepped out for a romantic walk in London this morning. Tom pulled up his shirt to give a peek at his abs, which have nothing in terms of hair compared to his very scruffy face. Tom and Sienna shared a kiss during another stroll earlier in the week. Sienna is gearing up for her latest Twenty8Twelve presentation along with sister Savannah after recently returning home from a trip to Ethiopia with the International Medical Corps. Tom and Sienna also recently entertained friends Robert Pattinson and Kristen Stewart in the UK. Kristen is currently there shooting Snow White and the Huntsman and Robert visited earlier this month, though is now back in the states.

Ryan Gosling puffed on a cigarette with the pack tucked into his pants as he shot a scene on the set of The Gangster Squad in LA on Friday. He was joined by his costars Josh Brolin and Michael Pena for the day of work on their new mob drama set in the 1940s and '50s. Ryan has been going nonstop this Summer between promoting Drive, The Ides of March, and Crazy, Stupid, Love and shooting new projects like this one and The Place Beyond the Pines. This film will bring Ryan back together with Emma Stone, though he's rumored to be currently romantic with another costar, Eva Mendes, who he was spotted with at Disneyland earlier this month. Ryan's gritty, violent movie Drive is out this weekend to a largely positive reception — check out BuzzSugar's Drive review — and while doing press at TIFF, Ryan revealed his sweet side. He talked about trading acting for fatherhood someday and gushed about ex-girlfriends Sandra Bullock and Rachel McAdams.

This week was packed with star-studded events from Fashion Week to the Toronto International Film Festival and more! George Clooney brought new girlfriend Stacy Keibler to Canada, while Victoria Beckham shared adorable shopping trips with baby Harper in NYC. Jennifer Garner showed off her growing bump on the red carpet for Butter, and Blake Lively hit the set of Savages in a bikini. That's not all that happened this week — click through to see the best pictures and biggest news of the week!

Temperatures in NYC took a dip yesterday giving Sarah Jessica Parker and daughter Tabitha a chance to slip into cozy Fall sweaters. The girls ventured out on an early morning errand and later joined up with Tabitha's twin, Marion. SJP's been busy promoting her new film I Don't Know How She Does It, which hit theaters yesterday, and SJP told us there's not a "master plan" to balancing work and family and that she prefers leading an "interesting and complicated life." Now that SJP's wrapped up one project she can focus on another; the second season of her Bravo series Work of Art debuts Oct. 12. with 15 new artists competing for a $100,000 grand prize.