Dakota Fanning

Dakota Fanning wore a sequined Stella McCartney gown at last night's London premiere of Now Is Good. While chatting with press, Dakota talked about her Stella dress, saying, "I picked this dress because I thought I should wear a British designer, since this is a British film and I'm here in London." She was joined on the red carpet by costars Jeremy Irvine, Kaya Scodelario, and Olivia Williams. Based on Jenny Downham's novel Before I Die, Now Is Good features Dakota as a young cancer patient determined to live her life to the fullest. Up next, Dakota is sharing the big screen with Robert Pattinson, Kristen Stewart, and Taylor Lautner in the Twilight franchise's final installment, Breaking Dawn Part 2, due out Nov. 16.

Maggie Gyllenhaal brought her daughters, Ramona and Gloria, to visit her husband, Peter Sarsgaard, yesterday on the NYC set of Very Good Girls. Three-month-old Gloria was nestled against Maggie to check out the action. Maggie and Peter welcomed the little one back in the Spring on April 19.

The film was actually written by Maggie's mom Naomi Foner, who was seen watching a take with almost 6-year-old Ramona on her lap. Peter joined in on shooting with the movie's stars, Dakota Fanning and Elizabeth Olsen, who have been hard at work for much of the Summer. Making the film has become a real family effort — even Maggie's brother Jake Gyllenhall has been on the set.

Some of Hollywood's most famous faces were spotted working all over the world this week. In LA, Halle Berry playfully chased her daughter, Nahla Aubry, around the set of her latest film, The Hive, while in NYC Blake Lively and Chace Crawford had a laugh between takes on the Gossip Girl set. Michael Sheen visited his girlfriend, Rachel McAdams, while she was filming About Time in Cornwall, England, and Ben Affleck and Justin Timberlake boarded a boat in Puerto Rico for a scene in their next film, Runner, Runner. Click through to see more stars on set!

Jake Gyllenhaal swung by the NYC set of Very Good Girls in NYC yesterday to say hi to his mom, the movie's screenwriter Naomi Foner. He was also able to catch a few minutes with the film's stars, Dakota Fanning and Elizabeth Olsen. It's been a long week on set for the girls. Dakota and Elizabeth wore bikinis for a recent shoot by the beach in Brooklyn, and yesterday, they looked a little roughed up to shoot scenes out on the streets of Manhattan.

Dakota Fanning and Elizabeth Olsen were back on the set of Very Good Girls yesterday in nude-colored strapless bikinis. Dakota and Elizabeth, who splashed around together between takes, play best friends who end up falling for the same guy in the movie. The story was written by Jake Gyllenhaal's mother, screenwriter Naomi Foner. The cast also includes Demi Moore and Richard Dreyfuss, both of whom were spotted on the NYC set last week. Yesterday, though, Dakota and Elizabeth were solo as they filmed some swimsuit-clad scenes in the ocean at a Brooklyn beach, braving the chilly water as crew members waded along with them. Let us know which celeb you think should come out on top in this year's PopSugar Bikini Bracket and you might be the lucky winner of a $500 gift card for Neiman Marcus.

Summer is heating up, but Hollywood's hardest-working celebrities aren't slowing down. Tom Cruise was all smiles while handling heavy weaponry on the Oblivion set in California, while across the country, Hilary Swank was spotted on the set of Mary and Martha in North Carolina. Elizabeth Olsen and Dakota Fanning worked on Very Good Girls in NYC, and in Massachusetts, Kate Winslet covered up in a robe before getting to work on Labor Day. Click through to see more stars at work!

Dakota Fanning was back at work on the set of Very Good Girls in Brooklyn yesterday. She sported an oversized denim button-down and biker boots while filming and was joined by costar Elizabeth Olsen. The pair have been shooting scenes in the Big Apple recently. Last week, Dakota and Elizabeth rode bikes while filming and caught up between takes. The film, which was written by Jake Gyllenhaal's mom, Naomi Foner, paints the girls as best friends who fall for the same guy. It also stars Richard Dreyfuss and Demi Moore, who was on set yesterday as well.

Elizabeth Olsen and Dakota Fanning worked together on the Brooklyn set of Very Good Girls on Thursday and Friday. The ladies rode bikes and shared laughs between scenes and costume changes. Dakota and Lizzy play friends who fall for the same guy in a story created by screenwriter Naomi Foner, who happens to be Jake and Maggie Gyllenhaal's mother. Elizabeth kicked back yesterday with a trip to her local Whole Foods. The youngest Olsen sister stocked up on groceries and hailed a cab back to her apartment afterward. This is shaping up to be another busy week for Elizabeth, since her Red Lights, with costars Robert De Niro and Sigourney Weaver, opens on Friday.

Hollywood stars may have taken a quick break to celebrate the Fourth of July on Wednesday, but the rest of the week they were hard at work. In NYC, Garrett Hedlund and Jennifer Hudson scrubbed up and got into character on the set of Lullaby, while Keira Knightley and Adam Levine shot a scene for Can a Song Save Your Life. Several other stars, including Elizabeth Olsen and Dakota Fanning, were also spotted in NYC, and all the way in Croatia, Naomi Watts channeled Princess Diana while filming Caught in Flight. Click through to see more stars on set!