Kim Kardashian and her sister Kourtney wore matching white Juicy Couture track suits as they left their hotel in Montecito today. The duo were headed to the wedding venue, a private estate, where Kim will get ready for her big day. Their mom, Kris Jenner, was also spotted on her way to the event while Kim's stepdad Bruce was busy picking up a coffee in town earlier this morning. Bruce was also decked out in a white outfit, though all eyes will soon be on Kim and her groom, Kris Humphries. Kris will wear a custom white Ermenegildo Zegna tuxedo jacket and black pants, and his groomsmen will be in black tuxes from the same designer. Details on Kim's dress have been kept quiet, but she did share that she had help from pal Nicole Richie in choosing the style, which she says will be more "old Hollywood" than trendy.

Jason Segel and Kermit the Frog made an appearance at D23 this morning at the Anaheim Convention Center to chat about The Muppets. The duo weren't joined by leading lady Amy Adams, though another of the film's female stars, Miss Piggy, did arrive shortly after Kermit and Jason took the stage. In typical spotlight-hogging fashion, Piggy was chauffeured to the Disney expo in the sidecar of a motorcycle by a tough-looking biker companion! In Amy's absence today, Jason, Kermit, and Piggy played two never-before-seen clips from the film. One featured Jason and Amy visiting Kermit at his swanky home in Bel-Air, while the other was a musical number that showed the whole gang tidying up the long-abandoned Muppet Theater to the tune of "We Built this City." We were behind the scenes on The Muppets set this Winter and had a chance to chat with Amy about taking on the role, as well as the fun she had introducing her young daughter, Aviana, to her cuddly costars. Today, after Jason shared the preview with fans and media, he stopped to talk with us about the passion project backstage. Many details about the movie have been kept under wraps, and he told us that his friends and family have been "respectful" about his desire to make the film a surprise and have generally avoided grilling him for spoilers. Stay tuned for the next PopSugar Rush to watch our full interview with him and to see more of our D23 coverage from this weekend!

Scarlett Johansson, Robert Downey Jr., Chris Hemsworth, Cobie Smulders, and Jeremy Renner were among the stars of The Avengers who took the stage at today's D23 Expo in Anaheim. The actors gave fans at the Disney convention a first look at their highly anticipated production, which brings together some of Marvel's most beloved characters. The project, which is still shooting in Ohio, is slated to hit theaters in May of 2012. In fact, Mark Ruffalo and Chris Evans weren't able to join the rest of the onscreen superheroes at the event because they are still tied up on the set of the film. The studio previewed some early clips from The Avengers, including a showdown between Tony Stark and Loki — played by Tom Hiddleston — and another that showed Mark in action as The Hulk. Scarlett, who is still rocking the same red hair as her character, Black Widow, wore a bright coral minidress and patent pumps to help intro the movie. It was one of several upcoming releases hyped at D23 today, but The Avengers definitely drew the strongest fan reaction, with Robert Downey Jr. eliciting a standing ovation from the arena the moment he stepped onto the stage. Robert, who missed the first showing of the preview clip, even asked that they play it a second time so he and the crowd could enjoy it together! Stay tuned for more of our coverage from D23 and watch Monday's PopSugar Rush to see our interviews with The Avengers cast.

Angelina Jolie was in bright green this morning as she left the island of Brijuni with her sons Maddox and Pax. She and her oldest boys made the trip to Croatia to attend a production of Shakespeare's King Lear at the invitation of actor Rade Serbedzija. Angelina apparently met with President Ivo Josipovic and his wife Tanja before the show, and she and Ivo got back together this morning to discuss the landmine problems in Croatia. The quick visit comes after Angelina and Brad Pitt traveled with their six kids to Scotland, where Brad is currently filming World War Z. He was seen sipping on a glass of wine on set today, while the younger Jolie-Pitt kids were spotted playing games outside near the estate where the family is staying.

It was an exciting week in Hollywood, with some of our favorite stars traveling the globe, celebrating milestones, and taking off for vacation. Reese Witherspoon rocked a bikini in Hawaii with Jim Toth, while the Jolie-Pitt clan was on the go again as they headed to Glasgow. Halle Berry marked her 45th birthday with a beach day, and we got a look at new stills of Robert Pattinson and Kristen Stewart in Breaking Dawn. That's not all that happened, so click through for a look at the best pictures and biggest stories!

Kim Kardashian kicked off her shoes to take pictures at a beach in LA yesterday. She and her nephew Mason, along with photographers and a camera crew, captured a few sweet moments in the sand just hours before Kim's big day. The quick photo session was part of an evening that also included another prewedding gathering in Montecito, where Kim and Kris Humphries will tie the knot today. The duo already hosted a rehearsal dinner in Beverly Hills on Thursday, and it looks like the latest event was also full of friends and family. Kim finished her fun night off with a brow treatment by Anastasia and she was up early this morning to share her excitement about her nuptials. Kim exclaimed, "Today is the day!" on her website and urged fans to sign her virtual guest book.

Reese Witherspoon got goofy during a surfing lesson in Kauai yesterday. She smiled big and posed while Jim Toth watched from the sand and her kids Ava and Deacon worked on their skills nearby. Reese has been on vacation in Hawaii with Jim, Ava, and Deacon all week, and the foursome has been all about hitting the beach. We've seen Reese in a bikini twice, though she switched up her swimwear on Thursday when she wore a plunging black one-piece to play in the sun. It's been a fun Summer for the star, who also traveled to Europe with Jim for their second honeymoon a few weeks ago.

Bar Refaeli hit the beach with friends in Greece Thursday. The model splashed in the water, danced in the sand with pals, and sipped on a cold drink during their fun day in the sun. This is just one of many Bar Refaeli bikini sightings of the Summer; she's been on the go showing off her toned physique all season long. Bar kicked things off last month in Italy, where she and boyfriend David Fisher yachted off the coast, before heading to Israel where she covered herself in mud from the Dead Sea.

Blake Lively and Leonardo DiCaprio were spotted on their way into Fred Segal in Santa Monica Friday. The couple browsed together and then headed to Umami Burger, where Leo snacked on onion rings. Blake and Leo's day date came to an end when Blake had to get back to work on Savages, which she's been filming alongside Salma Hayek all week. While Blake's been busy on set, Leo showed off his new eco-friendly ride, the $100,000 Fisker Karma sedan, during a drive around town. Leo was also in the spotlight for his latest movie project, when a still of him from the upcoming J. Edgar Hoover biopic was released. Blake and Leo have been out and about together all Summer, though we'll have to wait and see if Leo helps Blake celebrate her 24th birthday, which is coming up next week.