Not long ago I saw Anna Pacquin in the subway in NYC. She looked just like…Anna Pacquin. She has a beautfilul mouth - that’s what caught my eye. (Note - am married mother of 3)
What celebrities have you seen on the bus or the subway or the train?
I’ve only seen one celebrity on the subway. I was so excited, and it made my day.
It was Ron Jeremy.
On the London Underground, travelling to and from work, I’ve seen Glenda Jackson a few times.
Do planes count?
I saw (the guy who plays) Tony Almeda (from 24 ) on a flight from Dallas to Orange County.
I was behind Kristin Scott Thomas in line at a DC Starbucks.
I sat next to comedianne Carol Leifer in first class on a trip from LAX to LaGuardia.
I bumped into Jake “The Snake” (the old-school wrestler) at an airport when I was about 5 or 6. I didn’t ask for his autograph cause I was afraid. I do remember that he carried his big suitcase on his shoulder, much in the same manner as I carry steal I-beams when I work construction cough cough
Hehehe.
–greenphan
If planes count, mebbe airports do: I’ve seen Salman Rushdie in some really small provincial Canadian airport (too long ago to remember which one, but it was at the height of the fatwa and I remember being quite glad that we were catching a different plane) and the ever-perky Kylie Minogue at Charles de Gaulle. [sub]Boy, she’s short.[/sub]
On the subway, I saw Gregory Hines.
On the PATH aka tubes (like a subway only it goes between NYC and Jersey City/Hoboken NJ) I sat across from John Kapelos (Det. Schanke on “Forever Knight”) which was a thrill because I am a big fan of the show.
Celebrity sightings in NYC though are too numerous to mention, lol.
"Subway Elvis" (it’s a Toronto thing) 
None on the subway, but a lot in airports/planes/hotels. And they were mostly sports people.
Mike Ditka, Phoenix, PHX
Robert Culp, Ontario, CA
Randell Cunningham, PHX
Kareem Abdul-Jabbar, LAX
Al McGuire and Dick Enberg, PHX
Ahmad Rashad, PHX
Vanessa Williams, PHX
Chuck Berry, St. Louis
Sen. Ted Kennedy, Salt Lake City
Terry Bradshaw, DFW
Phil Simms, PHX
Lisa Bonet, Garden City, NY
Mike Krukow, PHX
Reginald VelJohnson, LAX
As a wide-eyed young wrestling fan, I spied “Macho Man” Randy Savage on an airplane in full gear, with the lovely Miss Elizabeth, as well.
Oh, and also, Artie Lange from the Stern show on the PATH train to Hoboken.
I sat opposite Dom DeLuise on a shuttle bus at O’Hare airport.
Just last week I meet and talked to Bam Magera from Jackass on A Dublin street. They were here for the premiere of the movie and seemed like they were rather enjoying themselves.
Was he snacking on a Slimjim? 
I lived down the street from Bam Margera and my brother was in his class in grade school, so I rode the school bus with him…does that count?
On the Subway
Tony Randall
On a plane
Liza
In movie theatres
Harrison Ford, Alan Rickman, Goldie Hawn, David Schwimmer and others.
World Eater
Since this was in the mid-80’s, a more apt question would be: Was he snackin on some 'roid pills?
I’m assuming there were other wrasslers on the airplane, but Macho Man was the only one wearing his “costume”. It must be hard not sticking out while sporting full fluorescent attire.
I saw Arlen Specter (Senator from Pennsylvania) getting off an Amtrak train - does that count?
I almost saw Christine Todd Whitman while locked in a bathroom tied to a chair and dressed as a clown. Long story.
Apos, I think you may need to start a thread to tell that story!
I saw Tim Robbins on the commuter rail from New Haven to NYC.