Nikki Blonsky (Hairspray), Ally Sheedy, and Colin Quinn have joined the cast of teen comedy Harold. Blonsky will play Rhonda, the awkward best friend of balding teen Harold (Spencer Breslin), while Sheedy plays Maureen, Harold's mother who helps her prematurely aging son cope with incessant teasing. Quinn portrays a drunken barfly who's a regular at a strip club Harold frequents, and Cuba Gooding Jr., who is one of the movie's producers... appears as a school janitor who befriends Harold. Filming just got underway in Great Neck, N.Y., Blonsky's hometown. The 18-year-old actress said she had no idea they would be filming there when she signed onto the project. It is Blonsky's first role since she landed the starring role as Tracy Turnblad in musical feature Hairspray.