04/11/2012 11:07 am ET

'Pawn Stars' Heads To 'iCarly' And More Casting News

Nickelodeon's revving up for a brush with Sin City. The boys of History's "Pawn Stars" -- Rick, Corey and Chumlee -- are headed to the popular teen comedy "iCarly."

According to EW, the episode centers on Carly (Miranda Cosgrove) and Sam (Jennette McCurdy)'s road trip to Las Vegas when they learn Sam's mother is being held in jail there. They meet the guys of Gold & Silver Pawn Shop upon arrival, and pawn some of their possessions to collect enough money for bail.

Other guest stars on "iCarly" have included Michelle Obama, the British boy band One Direction and "The Big Bang Theory" star Jim Parsons.

In other casting news...

Lauren Cohan will be a series regular on "The Walking Dead." Cohan will be back as farmer Hershel Greene's daughter in Season 3 of the AMC series. [TV Guide]

James Van Der Beek lands a guest spot on "Law & Order: SVU." The former "Dawson's Creek" star, who soon appears as himself on "Don't Trust The B---- In Apartment 23," is set to play a former friend of a doctor on an episode scheduled to air May 9. [TV Guide]

"24" star Sarah Clarke has booked a gig on "Covert Affairs." Clarke is set to replace Rebecca Kreskoff on the USA drama as Lena Smith, a CIA operative running her own division. [TV Guide]

Disney Channel star Lili Simmons is headed to "Banshee." Trading Disney for drama, Simmons will star in Cinemax's 10-episode series as Rebecca Bowman, a girl who leads an Amish lifestyle by day and a sexually adventurous one by night. [TVLine]