Leonardo DiCaprio's posse reunited to support him at the premiere of the 11th Hour in LA. Lukas and Tobey looked all grown up in their white shirts and suit coats while Adrian Grenier went all dark and sexy. Kate Bosworth looked amazingly happy and healthy. The main man of the hour was proud to show off his hard work on a project he's so passionate about. Leo narrates the documentary that features the leading scientists and political figures of today. Here's more:
"It's not just global warming, it's not just a loss of biodiversity, it's not just the pollution of our oceans and the clearing of our rainforests and all these complicated systems," Leo tells ET. "[The movie] talks about the world economy, it talks about politics, it talks about personal transformation and environmental consciousness that we need to have in this generation to implement a lot of these changes that need to occur."
It's clear that Leo really wants to make a difference and he practices what he preaches. There's nothing sexier than that. Be sure to check back later for Buzz's interview with Julie Delpy! For lots more pics of the gang and more just read more
Images include Adrian Grenier, Leonardo DiCaprio, Jennifer Meyer, Tobey Maguire, Kate Bosworth, Julie Delpy, Lukas Haas, Leila Conners

















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1so nice to see julie delpy out and about. i wish i could watch the 11th hour. maybe online sometime. Leo's so great for "practicing what he preaches" for sure! So many others could be doing so much more. its good to see so many people supporting him and the 11th hour though!
2Kate is just wonderful ! She looks healthy again. I´m pretty sure Helena Christensen helped her. Helena has gone through a lot, but she did it. Maybe she helped. It´s so nice when girls help each other instead of going to a therapist and taking pills !!!!
3Leo...*sigh*...
4Maybe Kate and Helena are my new favorite bff´s right now. Nothing better than bff´s !!!!
5It's great Leo is so passionate
6Love love LOVE Leo. And Kate looks so gorgeous, I missed her fine bod from her blue crush days!
7I just love this guy!!!
8Kate Bosworth looks gorgeous although I'm not liking the dress.
9Where did Julie Delpy suddenly come from again, and why does she look so old and so frumpy? I know she's not immersed in the insanity of the extreme Hollywood grooming machine, but she still should look a little more polished than she has been when she's hitting the red carpet. She's French after all!
10Not feeling the one sleeved dress Kate is wearing...very odd.
11I find myself unmoved by the celebs talking about the environment yet quite a few travel on private jets etc etc.
12Nice pics.
13man. tobey, adrian, and leo all looks sooo hot. oh, to be at this party!
14Adrian Grenier! I love seeing him, we need more!
15Those eyes......
nya - the whole co2 thing is just some new fashion now. The amount of carbon produced by man raises the temperature to 0,1 degree celsius within 100 years. That´s totally negligible. The thing is bullsh*t. Thank god al gore did not become presiden
That doesn´t mean we don´t have to be careful with the resourses of our beautiful planet !!! In fact we have to be very careful !!! But the man produced carbon-climate-change is just a lie and that´s matter of fact.
What´s up with the people in Africa. Pollution in China - these are so problems the whole carbon thing tries to disctract from in order to make money. that´s the truth. take it or leave it.
16Adrian Grenier he is soo gorgeous. i saw the trailer for this documentary. it looks kinda interesting. i am for sure going to check it out.
17so weird, adrien grenier looks just like my little brother...or vice-versa i guess.
18Kate is cute but that dress is fug. And those shoes don't look good with it.
19how hot is kate? so hot, i love her!
20I like the dress, but a little more sophisticated shoe´s would have better indeed, on the other hand: I think she´s a suede leather shoe´s girl !!
21KATE!?!?! IS THAT AN ASS!?!?! YAY!
22Kate does look really good. I love Leo he is soo cute.
23Great to see Leonardo - thanks! He looks fantastic.
24Does Adrian ever shave?
25Yeah, thank god George Bush is President
And I'm sorry but when you see how the climate is changing all over the earth, it's scary. The rate the glaciers are melting, the weather we've been having in NY alone is scary. A tornado hitting Bay Ridge, Brooklyn? Yeah, that's just sooooo common.
I digress, Leo is hot and I like the fact he's so vocal about politics and the environment. It's better than most of young Hollywood's self serving antics.
26Oh I love Lukas Haas...I can't believe he's so grown up. And Adrian Grenier is so handsome.
27Kate looks nice, but I don't like that dress.
28we have to be very careful with this beautiful planet, but the carbon thing is a lie, all the carbon lie articles were removed from wikipedia, it´s kind of a mafia. One thing: I´m really not political about this, I don´t care if anyone believe´s me or not, as long as I know that it is a matter of fact
29i'm so excited about this documentary... have u guys heard about greenissexy.org
30...it gives you VERY simple tips on how to help are little world =0)
man Lukas is still so hot!!
31i never saw the appeal of adrian grier
32but leo is looking gooood
Kate looks amazing! Agreed the dress looks a little bulky with the solitary sleeve, but she's wearing it well--modern, sleek, chic, and elegant. Great shoes and bag too, btw. Go Kate!
33I'm with jmast..
♥ Leo!!
I want to see this movie!
Kate Bosworth looks very good!!
34Who would have known that the skinny kid they brought on Growing Pains would grow up to be become such a passionate and educated man ?!
35Awesome.
36This documentary sounds very interesting.
37Yoonyah:
"Thank god al gore did not become presiden"
Tell that to the hundreds and thousands of dead and displaced Iraqis. And don't even start me on the carbon thing.
38@ Yooniah,what about the cars,the plains,the energy we use daily at home,industries etc...it is harmful right ? I don't really get your point when you say that the carbon thing is no big deal,could you tell us more?
39My point is if the carbon thing is not really important what's really important to do then?
Kate looks gorgeous!!!Looking healthy and pretty.
40I love Delpy. She's great. And Kate Bosworth looks so pretty.
41of course I tell you more: you should drive a small car, because the oil resources of this planet will eventually run dry. You should drive a small car because it doesn´t pollute the air as much as a big one. You should save energy to save resources (and money), but not because to reduce carbon, because the man produced carbon isn´t the reason of the climate change, as scientist already know. I hope I could help you.
42Why is it that sometimes when I see Leo now, I think of how *Austin Powers* said his name in the movie…down low and surprised. It always plays that way in my head…I should NOT admit that to anyone, but it’s funny to me.
I like Mike Meyers every time he says Leo’s name while in character. And I like Leo too. Leo seems like one of the rare good guys in Hollywood.
43Tobey's wife is soooo ugly....
44WHAT WAS JEN MEYER DOING AT LEO'S MOVIE PREMIERE? SHE DOESN'T EVEN LIKE LEO BECAUSE SHE WAS PISSED OFF AT HIM FOR HANGING OUT WITH HIM ALOT!!!! SHE DOESN'T NEED TO GO EVERYWHERE WITH TOBEY LIKE A DOG ON A LEASH!!!! HE LIKE TAKES HER UGLY ASS EVERYWHERE WITH HIM!!!! WHICH I THINK IS TOTALLY SICK!!!!! ABSOLUTELY NO SPACE WHATSOEVER WHEN SHE'S AROUND HIM IN PUBLIC!!!!! THE LOOK ON HER FACE TELLS ME SHE'S REALLY UP TO SOMETHING!!!!
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