Mark Ruffalo

Leonardo DiCaprio teamed up with Christie's to cohost the 11th Hour Auction in NYC last night. It was a successful event for Leo since the auction reportedly raised $35 million to benefit environmental and wildlife conservation efforts, almost doubling the goal of $18 million. He had the support of his longtime friend and Great Gatsby costar Tobey Maguire, who put in a winning bid on one of 33 pieces of contemporary art. Leo contributed something from his own art collection, a print called "Ocean V" by well-known photographer Andreas Gursky. Also out for the evening were Bradley Cooper, Mark Ruffalo, and Salma Hayek.

It was Leonardo's second art-inspired outing in as many days, since he also made an appearance at the Brant Foundation Art Study Center's Andy Warhol showing in Greenwich, CT, on Sunday. He'll be switching gears from art to film in the coming days, though, when he debuts The Great Gatsby in Cannes later this week.

Leave it to a movie about magic to bring us cool photos to build our anticipation. You may have already seen the Now You See Me trailer, but here are some snaps from the film to get you excited for its release. So, what do you get from a squad of magicians who rob a bank and the FBI team who's out to get them? You don't have to wait until the movie comes out on May 31 to get an idea. Just click on for tricky pics from Jesse Eisenberg, Isla Fisher, Mark Ruffalo, Morgan Freeman, and more.

A few of the most fashionable celebrities in Hollywood turned out for Chanel's pre-Oscars dinner in LA last night. Best actress nominee Jessica Chastain and Kate Bosworth wore Chanel dresses for the event, where they rubbed elbows with Rosie Huntington-Whiteley, Ginnifer Goodwin, January Jones, and Rachel Zoe.

Jessica walked the red carpet solo, but she raised plenty of eyebrows the previous night when she left the Women in Film pre-Oscars bash with boyfriend Gian Luca Passi de Preposulo. She has been notoriously tight-lipped about her romantic life, but it was revealed that Jessica Chastain's boyfriend has connections to the fashion industry: he's an executive at Moncler. However, Jessica will be taking her grandmother — not boyfriend Gian — to the Oscars, where she is up for the best actress prize. Don't forget to tune in to our LIVE Oscars red carpet coverage and viewing party starting tonight at 5:30 p.m. EST/2:30 p.m. PST.

Channing Tatum and an almost unrecognizable Mark Ruffalo got to work filming Foxcatcher in Pittsburgh yesterday. The movie is based on the true story of the 1996 murder of wrestler David Schultz, played by Mark, and will also star Steve Carell. Channing recently said of the film, "It's going to be the hardest acting challenge I've had to date." He broke from the set over the weekend, though, to watch the Steelers take on the San Diego Chargers with a group of guy friends.

The year may be winding down, but Channing's staying busy, as he did for most of 2012. He hit the big screen with three successful releases, The Vow, Magic Mike, and 21 Jump Street, was crowned People's Sexiest Man Alive, opened the New Orleans bar Saints & Sinners, and filmed White House Down. His run isn't over yet, since he could still pick up the favorite male and sexiest man titles in our Best of 2012 polls!

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!

Keira Knightley's been busy over the past few days on the NYC set of her romantic comedy, Can a Song Save Your Life? Two weeks ago, we saw Keira in character and holding hands with Maroon 5's Adam Levine, but last Thursday, she was spotted kissing costar Mark Ruffalo. The pair were at it once again on Friday shooting a scene with instruments. Keira was before the cameras again today, seeming to be having a great time with the cast and crew. Keira's good mood could have something to do with her upcoming wedding — a new report says Keira's fiancé, James Righton, is like a "lovestruck puppy" when she's around.

Keira Knightley had a busy afternoon on the set of Can a Song Save Your Life? yesterday in NYC. She had an outfit change for two different scenes with costar Mark Ruffalo. Mark was her leading man this time around, but last week, Keira shot alongside Adam Levine. Young actress Hailee Steinfeld was on set, too, sporting three different ensembles for her own stint in front of the camera with Mark.

Keira's been busy with work since announcing her engagement to Klaxons musician James Righton in late May. Last month was a whirlwind of promotion for her Seeking a Friend For the End of the World, in which she starred opposite of Steve Carell. James, though, has been able to visit with Keira in the Big Apple. Keira and James showed PDA when he visited her in NYC recently.