Julie Bowen, Modern Family
The Emmy award winning show films scenes for an upcoming episode in Valencia, Calif.
Josh Holloway, Mission: Impossible IV
Officially this is a TV gallery, and MI4 is a movie shoot, but who cares? That's Sawyer, yo, and we're overjoyed that our favorite Oceanic 815er's post-island career is flourishing.
Ed Westwick, Gossip Girl
With or without Blair, Chuck Bass is ready to paint the town red.
Blake Lively & Sam Page, Gossip Girl
Columbia's notorious new student is hot for teacher. That's what we call matriculating, Serena-style.
Ashley Tisdale & Matt Barr, Hellcats
Boo! Bet Marti won't be cheering on this hookup between her BFF Dan and captain Savannah! (Who's rooting for another slapdown between the reconciled roommates?)
Taylor Momsen, Gossip Girl
If Lil J is trying to stage another runaway (note the arrows), she won't get far in that outfit.
Neil Patrick Harris & Wayne Brady, How I Met Your Mother
Hooray! Barney's gay, black brother makes a triumphant return for season six of HIMYM. Can't wait to see what's in store for these bros.
Matt Damon, Sherri Shepherd & Tracy Morgan, 30 Rock
Carol the pilot returns to fly the friendly skies with Tracy and his wife, Angie. So where is Liz Lemon? (Not with Wesley Snipes, we hope.)
Britney Spears, Glee
The pop superstar gleeks out to the max (with her assistant Brett Miller) while filming her cameo for "Britney/Brittany," episode two in the hit musical series' second season.
Jennifer Carpenter & Michael C. Hall, Dexter
No surprise here: Dexter's moving his family out of the house of horror. What are the chances their new home will have a bathtub?
Lea Michele, Glee
Britney Spears, is that you?! Guess we know which of the onetime Queen of Pop's hit singles Rachel Berry will be busting out on an upcoming tribute episode of the Fox hit.
Justin Bieber, CSI: Crime Scene Investigation
Another victim of Bieber fever! The swoonworthy popster stops by the premiere of the CBS hit this fall as a "troubled teen."
Michael C. Hall, Dexter
Dexter's a single dad now (sniff), which means diaper duty, playdates...and finding a babysitter every time he goes out for a kill.
Kim Kardashian, AnnaLynne McCord & Khloé Kardashian Odom, 90210
The E! reality stars don't need directions to this ZIP code.
See more celebs on set in our TV Stunt Casting gallery!
Chace Crawford & Katie Cassidy, Gossip Girl
Aw, how adorable are Nate Archibald and his new GF? (The former Melrose Place star is hooking up with the Upper East Side hottie in a multi-episode arc.)
Ed Westwick, Gossip Girl
Dead man walking...or did Manhattan manwhore Chuck Bass survive his season-finale shooting?
David Duchovny, Californication
They may not be pretty, but at least Hank Moody is wearing his pants for a change.
Stephen Moyer & Alexander Skarsgård, True Blood
Mmm...more vampire porn?
Jessica Simpson, Entourage
First a tweet and now a sighting of the singer shooting a guest spot with Jeremy Piven on the Beverly Hills set.
David Boreanaz, Bones
Let them eat cake! The actor and his squintmates celebrate the show's 100th episode at Fox Studios.
John Cho, FlashForward
The FBI agent without a future breaks character to share some Cho time with his adorable son.
Kurt Warner & Brenda Song, The Suite Life on Deck
Life at the Tipton hotel just got a lot sweeter with an appearance by the Arizona Cardinals star quarterback. (We dare him to wear that uniform on the football field.)
Heather Locklear, Melrose Place
Can you believe this woman is almost 50 years old?
Nina Dobrev & Paul Wesley, The Vampire Diaries
In this break from shooting the Halloween-themed episode "Haunted," Elena introduces her ancient paramour to the Interwebs.