updated 02/25/2011 AT 1:10 PM ET
•originally published 02/25/2011 AT 2:30 PM ET
Hot, young and talented – British actor Alex Pettyfer appears to have everything he needs to make it in Hollywood. Including, it seems, an attitude problem, according to some insiders.
The 20-year-old newcomer’s star has risen quickly. He has a lead role in the new films I Am Number Four and Beastly, was – until their recent reported split – dating Glee star Dianna Agron and has a slate of movie offers.
That momentum may soon be reversing, however. Pettyfer is “talented, [but] he’s just immature [and] opinionated,” a source tells PEOPLE. “Let’s hope he can pull it together.” Adds the source: “Drama surrounds him.”
Plus, in the midst of all the bad-boy buzz, Pettyfer didn’t help his case by showing up late for Beastly’s premiere presented by Candies in Los Angeles Thursday night.