'True Blood' Season 6 Adds Jurnee Smollett And More Casting News

"Friday Night Lights" alum Jurnee Smollett has joined the vamp-y HBO drama as a series regular and "90210's" Amelia Rose Blaire will recur in Season 6, TVLine reports.

On "True Blood," Smollett -- who also famously played Michelle Tanner's best friend Denise on "Full House" -- will play optimist Nicole. According to TVLine, Nicole is concerned with doing the right thing versus doing something for compensation.

Elsewhere on "True Blood" Season 6, Blaire will portray Willa, Louisiana Governor Truman Burrell's (Arliss Howard) daugther, who disagrees with her father over vampire rights, according to TVLine.

In more casting news ...

Dave Annable is stopping by "Ben and Kate." The star of ABC's late "666 Park Avenue" heads to the Fox comedy as a hot college professor. Kate and BJ head back to school and take an ethics class together, which is taught Greg (Annable), who "doesn't always practice what he teaches." [TV Guide]

Summer Glau is guest starring on "Hawaii Five-0." Daniel Dae Kim tweeted a picture of himself with the "Firefly" alum on set earlier, but CBS has now confirmed that Glau will make an appearance. Her character will be involved with an underground fighting ring and is also on the hunt for the person who murdered her father. [TVLine]

Josh Groban is heading to "CSI: NY." The singer will play himself in a Valentine's Day installment of the CBS procedural, performing "Happy in My Heartache" in a restaurant. [EW]

"True Blood" Season 5 Character Posters