Josh Hartnett

Josh Hartnett got in on the pre-Oscars parties when he dropped by the Vanity Fair and Fiat party benefiting the United Nations International Labour Organization in LA last night. The star-studded event, which was hosted by Ron Howard and composer Hans Zimmer, also included Lake Bell, Alyssa Milano, and Adrien Brody as guests. Josh had a busy evening, as he also visited the Hollywood Domino and Bovet 1822 event in West Hollywood. Alyssa — who wore Gucci to last night's event — will likely have a lot more Academy Awards-related events to attend this weekend, since her husband, David Bugliari, reps Bradley Cooper, who is nominated for best actor. Bradley has a lot of events on his plate this week, including Wednesday night's Vanity Fair dinner for Silver Linings Playbook, which he attended alongside costar Jennifer Lawrence and director David O. Russell. Don't forget to join us for our LIVE Oscars viewing party and red carpet coverage on Sunday, Feb. 24 at 5:30 p.m. EST/2:30 p.m. PST.

Producer Joel Silver was the host to many celebrity guests at his Memorial Day bash yesterday in Malibu. Joel throws a special holiday bash every year, and his 2012 event was as star-studded as usual. Gavin Rossdale, home during a break from his tour with Bush, dropped by along with his wife, Gwen Stefani, and their boys, Zuma and Kingston. The family played together on a bouncy castle Joel rented for the occasion, then checked out the beach.

The little ones were able to say hi to Tobey Maguire's kids while the adults caught up. Both Courteney Cox and David Arquette swung by as well with their daughter, Coco, and Kate Beckinsale brought her daughter, Lily Sheen, and husband, Len Wiseman. Robert Downey, Jr. and his wife, Susan, said hello to their friends, but left newborn son, Exton, at home. Josh Hartnett and Ashley Greene, though, dropped by solo, as did Selena Gomez after her boyfriend, Justin Bieber, took off for Europe.

New couple Amanda Seyfried and Josh Hartnett were spotted picking out custom frames at Beverly Hills gallery on yesterday. The pair reportedly started dating in January and recently stepped out together in Malibu. Amanda and Josh took their dogs to the beach, where the four-legged companions chased after a tennis ball in the surf. In the past, Amanda's talked openly about on-again off-again boyfriend Dominic Cooper, but for now it seems she's keeping details about her relationship with Josh under wraps.

Hot new couple Josh Hartnett and Amanda Seyfried brought her dog Finn and his pup Iggy to run on the beach in Malibu on Wednesday. Josh and Amanda's romance was first reported earlier this month, though the two were apparently introduced by friends and have been seeing each other since January. They were spotted out shopping together over the weekend and after the sweet outing it seems that the two are ready to be more public with their relationship. Amanda has most recently been filming the biopic Lovelace, while Josh has a number of projects in the works for 2012.

Josh Hartnett and Hailee Steinfeld were on hand last night at LA's SkyBar to celebrate British fashion. The party, hosted by the British Fashion Council and attended by Anna Wintour, drew the actors as well as several high profile names in the industry. It was the conclusion to three days of presentations by some of England's rising style stars, like designers Mary Katrantzou, Jonathan Saunders, and one of Kate Middleton's favorite dressmakers, Roksanda Ilincic. Josh went low-key in a beanie and glasses at the cocktail party, while Hailee chatted up several of the designers during the festivities. Hailee, who was Miu Miu's spokesmodel last season, is back home in LA after hitting up Paris Fashion Week earlier this month. We caught up with the starlet during the soiree, so be sure to stay tuned to PopSugarTV for her interview and a special look inside the exclusive event!

Josh Hartnett and girlfriend Sophia Lie were spotted taking a midday stroll in NYC yesterday. The pair tried to cool off during the heat wave in cutoff shorts and t-shirts. Their walk came just ahead of Josh Hartnett's 33rd birthday today! The festivities kicked off last night with a guys' night out at the restaurant Rubirosa. Josh and Sophia rang in his special day while in Italy last year, enjoying a bikini- and shirtless- filled getaway in Ischia.

Josh Hartnett and his girlfriend, Sophia Lie, went shopping in NYC's SoHo neighborhood yesterday. The cute couple's outing was just the latest of their Summer strolls in the city, since they were spotted together on their way to a friend's party in June and again just before the Fourth of July. Josh is back in Manhattan following a weekend out in the Hamptons at Montauk earlier this month. The actor is enjoying his time off now that's he's wrapped up Singularity, though he'll soon get to work on Dark Star Hollow. This time last year Josh and Sophia were at the Ischia Film Festival, where he was honored, and this time around the festival has brought out supermodels Helena Christensen and Karolina Kurkova as well as Eli Roth and Christoph Waltz.

Josh Hartnett and Sophia Lie took a stroll on the streets of NYC's West Village on Thursday. The couple met up with friends at Imperial Woodpecker, which serves up New Orleans style snow cones, before going their separate ways. Josh and Sophia have been spotted out multiple times lately, with the duo enjoying a walk together and attending a fashionable bash last week. Their relationship seems to be going strong though Josh has also been out and about without his girlfriend. He grabbed lunch with friends on Tuesday and stepped out solo for a movie screening on Wednesday.

Josh Hartnett hit the red carpet for a screening of a restored version of the 1960s film La Dolce Vita in Tribeca last night. The event was hosted by the Cinema Society and Gucci, and Josh was solo despite spending recent days in the company of women. Josh was spotted out in NYC with his girlfriend, Sophia Lie, to kick off Memorial Day weekend and was back out for lunch with two special ladies on Tuesday. He had Sophia by his side for another East Coast bash that toasted photographer Mario Testino last week, and their public appearance confirmed that the duo are still an item after months of not being spotted together.