Zac Efron   Taylor Schilling Audrina Patridge  Ashley Tisdale
Zac Efron   Taylor Schilling Audrina Patridge  Ashley Tisdale

The hunky Zac Efron looked debonaire as he prepped for the red carpet at The Lucky One premiere Monday night in LA, with co-star Taylor Schilling by his side.

Zac's pal Ashley Tisdale turned out to support her friend, as did The Hills star Audrina Patridge, who shined in an all-white shorts ensemble.

Taylor wore a super hot Calvin Klein number, while Ashley looked cute in a bi-color, summery strapless dress.

In the film, Efron plays a marine, who travels to North Carolina after serving three tours in Iraq and searches for the unknown woman he believes was his good luck charm during the war. It's a romance that will have girls swooning over Zac in the lead role ... can't wait to see it!