The new half-hour comedy “Entourage” (9 p.m. Sunday, HBO) offers a fast-paced, slice-of-life glance at young Hollywood. What’s it like for a kid from Queens, N.Y., to see his face on a giant billboard on Sunset Boulevard? Vince (Adrian Grenier) has dreamy looks. But will he become the next Johnny Depp or merely the latest flash in the pan? He surrounds himself with hometown lackeys, including his “manager,” Eric (Kevin Connolly), his half-brother Drama (Kevin Dillon), and Turtle (Jerry Ferrara), who acts as chauffeur, go-fer and court jester.

Who cares about the antics of nouveau riche vulgarians? At its weakest, “Entourage” cannot answer that question. But at it’s frequent best, “Entourage” is pure, breezy fun, capturing the infectious if foul-mouthed camaraderie of buddies too green to be spoiled by the trappings of stardom. Does Vince allow Eric to make all of his decisions for him because he’s lazy, or because he trusts and admires him?

Jeremy Piven makes the most of a great role as Vince’s obnoxious agent, who frequently compares his Ivy League background to Eric’s experience as a pizza parlor manager. In lesser comedies (think “Arliss” and “Action”), Piven’s character would be the star. But here, his type-A loathsomeness only underscores the inherent, clueless decency of Vince and his pack.

Tonight’s highlights

• Vanessa Williams joins conductor Keith Lockhart on “Evening at Pops” (6 p.m., PBS).
• Chosen by the American Film Institute as the funniest American movie of all time is the 1959 comedy “Some Like It Hot” (7 p.m.,Turner Classic Movies).
• A teen molester charged on “Crime & Punishment” (9 p.m., NBC).

Sunday’s other highlights

• Repeat reports scheduled on “60 Minutes” (6 p.m., CBS): enduring poverty in the oil-rich nation of Equatorial Guinea; one woman’s transformation of a Virginia village; Howard Hughes’ medical charity.
• Olympic track and field trials (6 p.m., NBC).
• Brandy, Avril Lavigne and others are profiled on “Young Divas: The True Hollywood Story” (7 p.m., E!).