Justin Guarini Welcomes Baby Boy

Justin Guarini made his Broadway debut this season in Lincoln Center Theatre's Women on the Verge of a Nervous Breakdown as Carlos and then joined the cast of American Idiot in the role of Will. Other theatre credits include: Once on This Island (Daniel), The Little Prince (Prince). Solo albums: Justin Guarini (RCA Records), Stranger Things Have Happened. Film: Fast Girl (Darryl), From Justin to Kelly (Justin). TV: "American Idol" season one runner-up (Fox), "Run of the House" (Fox), "Film Fakers" (AMC), "Gone Country" (CMT season three), TV Guide Network host/correspondent, "Live With Regis & Kelly" (guest host, ABC). Other: Disney World's The American Idol Experience, virtual host.

Today, Guarini added another credit to his resume: father. The actor and his wife, Reina Capodici, welcomed son William Neko Bell Guarini to the family early this morning. "Quite a polite fellow for waiting until late Monday, early Tuesday to make his entrance," Guarini told PEOPLE.

He performed in the closing show of AMERICAN IDIOT Sunday night. Next, Guarini sets his sights on RENT at Surflight Theatre in Beach Haven, NJ, from May 28 through June 19. He will star as Roger.