Brittany Snow is glamorous in a floor-length Leanna Marshall for Diane von Furstenberg cobalt gown at the InStyle/Warner Bros after-party at the Beverly Hilton Hotel in Beverly Hills on Sunday night.

The 22-year-old actress hung out with good friends Zac Efron, Vanessa Hudgens and Amanda Bynes at the party.

Brittany is currently filming Clock Tower, out later this year. The movie is about a woman who is tormented by an evil that has haunted her family for generations, but the only man who believes her is the psychiatrist she meets in a mental institution.

Young Hollywood royalty Zac Efron and Vanessa Hudgens snuggle close together on at the InStyle/Warner Bros after-party at the Oasis Court in the Beverly Hilton Hotel on Sunday night.

The duo was attached at the hip throughout the whole evening and hung out with mutual friends — Megan Fox, Hayden Panettiere and Zac’s Hairspray costars Brittany Snow and Amanda Bynes. Zac was ever the good boyfriend–he carried around Vanessa’s clutch!

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Taylor Momsen works out a black fringe gown at the InStyle/Warner Bros. Golden Globe after-party at the Beverly Hilton Hotel in Beverly Hills on Sunday night.

The 15-year-old Gossip Girl star recently dished to Teen Vogue that she doesn’t have a stylist and does it all herself. She shared, “I don’t work with a stylist. I definitely do it myself, because I think style comes from within, and you have to add your own personal flair to it—otherwise it’s not you.”

Taylor’s co-star Blake Lively presented the award for Best TV Drama Series (Mad Men won).

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Hayden Panettiere goes gorgeous in a violet Gianfranco Ferre gown at the 2009 Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills on Sunday evening.

The 19-year-old Heroes actress accessorized with Fred Leighton jewelry and violet Ferragamo clutch.

Hayden presented the Best TV Drama Actor Golden Globe with Zac Efron. Gabriel Bryne took home the prize for his role in In Treatment.

10+ pics inside of Hayden looking glam gorgeous…

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The Jonas Brothers suit up for the 2009 Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills on Sunday night.

Nick hit the red carpet in a Burberry suit with David Yurman jewelry and a Rolex watch. Joe paired his Dior Homme suit with a burgundy shirt and Platinum jewelry. Kevin wore Emporio Armani for Product Red with Platinum jewelry as well.

The musical trio presented Wall-E with the Best Animated Feature Golden Globe.

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Miley Cyrus shines in a white Marchesa dress at the 2009 Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills on Sunday evening.

The 16-year-old teen sensation revealed on the red carpet that she had always dreamt of attending the coveted ceremony. She shared, “I am so exicted, this has been a dream of mine forever. I was like, ‘I really hope I get asked to come to the Golden Globes.’ And then I actually got nominated, so that’s the biggest thing that could happen to a girl, especially as young as I am. It’s out of this world.”

Miley is nominated for Best Original Song for Bolt’s “I Thought I Lost You.”

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Vanessa Hudgens glows in a gold Alberta Ferretti gown at the 2009 Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills on Sunday evening.

The 20-year-old actress accompanied boyfriend Zac Efron (in a Burberry suit, Ferragamo shoes and IWC watch) to the award ceremony. Zac will present Best TV Drama Actor with Heroes actress Hayden Panettiere.

Zac admitted he was nervous to present. He said, “I can’t believe it. [I] 100% [get nervous before presenting at awards shows]. Absolutely. Plus, you have to sit in a car for 1/2 hour before and just dwell on what you’re’ going to do at the show… I got out of the car to stretch because we were waiting so long.”

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