Liz Lemon is back, nerds! While no premiere date has been set, '30 Rock' is back in production.

The cast and crew have been hard at work on Season 6 for a few weeks and they recently hit the streets to film on location.

From the looks of the photos, guest star Denise Richards will be paired with Tracy Morgan's character, Tracy Jordan.

Another guest actor, 'X-Men' star James Marsden, was also on set that day. No word on who he'll be playing, but it could be a new love interest for Tina Fey's character.

Plus, it looks like the fictional sketch show 'TGS' has angered gay fans.

Check out the set photos below

Denise Richards is heading to '30 Rock.' According to E! Online, the actress will appear in the upcoming sixth season.

"So excited!! I'm going to be doing an episode of #30Rock! one of my favorite shows!!!!!" she tweeted.

James Marsden has also booked a '30 Rock' role. EW reports his role could be recurring, but NBC isn't revealing details. Could he be Liz Lemon's new lover?

Richards and Marsden join previously announced recurring guest star Will Arnett on the upcoming season of '30 Rock.' No premiere date has been given, but best guess is it'll show up on NBC sometime in the winter.

In other casting news ...

James Marsden was a saccharine sweet guy when he was in his early 20s. Particularly, he employed the sweet innocence of youth in the wooing techniques he used to win the heart of his wife, Lisa Linde. And it absolutely disgusted Chelsea Handler on 'Chelsea Lately' (Weeknights, 11PM ET on E!).

Early on in their dating, Marsden said, "I got my guitar and I serenaded her at the beach." He sang Garth Brook's 'The Dance,' and later they even went back to a jacuzzi and did the whole strawberries and champagne thing.

If it was a cheesy romantic film move, Marsden was trying it out. But it worked. "She married me," he told Handler, in response to her look of disgust.

Somewhere at the studios of 'The Late Late Show' (Weeknights, 12:37AM ET on CBS) there is a piece of lost footage from Craig Ferguson's interview with James Marsden. The fact that it was cut out makes us want to know what was on it even more.

Fans of Ferguson's show know that he prides himself on performing off the cuff, and usually airs anything and everything that happens. This leads to some funny moments when things don't go as planned, or even awkward moments in interviews. But it's part of the joy of watching the show.

Leading into the cut, the pair were talking about the acting performances of Tom Cruise and Dustin Hoffman in 'Rain Man' -- see what we meant about anything and everything? Marsden said of Hoffman, "Come on. It's a little over the top."

Having worked with Chelsea Handler on 'Hop,' James Marsden probably assumed appearing on 'Chelsea Lately' (weeknights, 11PM ET on E!) would be a breeze. But a friendly reunion it was not, as Handler teased him mercilessly.

She told the audience, "I had to remind you time and time again that you're not funny." Marsden countered, "She wouldn't deliver her dialogue off-camera." Handler recalled, "I would say, 'You're a terrible, terrible actor. Everything you say is not believable.'"

She then congratulated him in on the film's being No. 1 at the box office last weekend. Was her needling over? Nope.

She couldn't help but mention 'The Box' -- the "embarrassing" 2009 film he did with Cameron Diaz. "I hate you," he said grinning.

Cam and Mitchell are going gaga. Why? Three words: shirtless James Marsden.

Even though we've known the actor is heading to 'Modern Family' to spice up Cam and Mitchell's neighborhood, this new preview is still nothing short of wonderful.

Marsden plays a Barry, new neighbor who meets the couple after hopping into their hot tub uninvited.

The 'X-Men' and 'Enchanted' star will appear in the Wed., Jan. 5 episode on ABC at 9PM. Hopefully the preview below will warm all of you who are still snowed in.

Cam and Mitchell are getting a new neighbor: 'X-Men' star James Marsden.

According to TV Guide, Marsden will appear as a very hunky -- and shirtless -- neighbor on 'Modern Family.' Look for the shirtless antics to fluster Cam and Mitchell quite a bit.

Marsden, who appeared as the prince in 'Enchanted' and Corky Collins in 'Hairspray,' last popped up on the small screen in 'Ally McBeal.' He played Glenn Foy for 13 episodes from 2001-2002.

In other casting news ...

• Judith Light will replace Blythe Danner on 'Nurse Jackie.' The 'Ugly Betty' actress will step in for Danner as one of Dr. Cooper's lesbian moms opposite Swoosie Kurtz in a season 3 episode. [Deadline Hollywood]

• Keith Carradine will appear on 'The Big Bang Theory.' The veteran actor known for roles on 'Dexter' and 'Dollhouse' will pop up as Penny's father. Look for Carradine to appear in a November episode. [Ausiello Files]

• 'Prison Break' star Robert Knepper will guest on Showtime's 'Shameless.' Knepper has been tapped for a two-episode arc as a man who is after William H. Macy's character because of a scam they once pulled together. [Deadline Hollywood]