Attending the premiere of "17 Again" at Grauman's Chinese Theatre in Hollywood on Tuesday night, April 14, Jonas Brothers smiled to the cameras. Kevin Jonas, Joe Jonas, and Nick Jonas came to the event to watch the newest flick of Zac Efron. "At the '17 Again' premier supporting our good friend Zac - JB," the musical trio tweeted.

That night, Kevin looked cool wearing a t-shirt, vest, and scarf by All Saints matched with jeans and boots. As for Joe, he wore Neil Barrett leather jacket paired with jeans and boots. Meanwhile, Nick looked stylish wearing All Saints UK jacket matched with jeans and boots.

The flick's leading actor Zac hit the red carpet in formal outfits, giving his best pose to the photographers. In the meantime, his on-and-off-screen girlfriend Vanessa Hudgens looked very gorgeous in her orange dress.

Also joining the Disney stars in the movie premiere were Zac's "High School Musical" co-stars, Corbin Bleu, Monique Coleman, and Olesya Rulin. Additionally, the 21-year-old actor's "Hairspray" co-star, Brittany Snow, was also in attendance. more on celebrity-mania