You'd be surprised at the number of celebrities you have seen while on the Studio Tour. Most are dressed down and blend in with the other regular folks who roam the lot. Celebrities who aren't camera ready are shockingly normal looking. If you didn't know who they are were, you wouldn't take a second look.
Many years ago. they were shooting promos for Psycho 3 by the Psycho House. Anthony Perkins walked the length of the tram, talking and shaking hands. Other than that, I've seen crew members from SeaQuest DSV, but no name actors.
You don't really see Celebs from the Studio Tour, as a matter of fact, most celebrities tend to avoid the tram routes. If you spend enough time around that area though you will see them quite frequently. I saw Greg Kinnear pulling out of the Backlot's parking lot (off Barham). Saw Denzel Washington at Baja Fresh, briefly met Katie Holmes at Starbucks. At Warner Brothers (just down the road) I met Ellen Degeneres after the taping of one of her shows and saw Ryan Reynolds the same day.
Oddly, I've never cared about celebrities. I've run into them on occasion, but overall I never really cared. You used to see them a lot more, but that was before we had cameras on cell phones and TMZ etc. These days any unplanned public appearance could damage a celebrity's rep. Some still do it "for the fans" but as noted many avoid the trams to avoid the headaches and headlines.
"Happiness is a Low Water Level"
"Creating magical memories and making Managers cry since 1955!"
The tram I was on saw Frankie Munoz near Little Europe when he was filming Big Fat Liar. When my friend and I took the Warner Brothers tour, we saw Edward Norton having a hissy fit on his cell phone right after we left the Clint Eastwood Scoring stage! Ha!
Saw some sort of crew sitting out front the Earthquake Soundstage. It was the last ride of the day and the land was getting dark. Set out on the grassy area in front of the Earthquake building were many trailers, chairs, and I think stars. We had to go into quiet mode, so I knew that these were TV stars of some sort. I waved to them, and a few of them waved back to me. Not sure what TV show they're from since I don't watch much modern TV.