Come, come. Will Ferrell was hilarious in Elf, a genuinely enjoyable family movie. His problem is he seems to prefer movies geared to adolescent humor.

While I realize that many people in comedy are never considered "actors", I have to add one other name to this list.  Will Ferrell.  I don't even know if I spelled his name right.  He's not funny and he can't act.  He just looks stupid on screen.  No, I don't think that's the point of his movies -- there are many actors who play stupid characters on purpose.  Jim Carrey comes to mind, and I happen to think he is a fine actor when doing drama, but I just don't get this guy Will Ferrell (Farrell?).  Sorry, I just don't know the spelling.

Good Lord, put this on the calendar. I agree with freethinker about John Wayne who made a living portraying himself whether he was wearing a cowboy hat or a green beret. Same character, different outfit.

Chuck Norris, Jessica Simpson,Pauly Shore boy there are so many. I am not a big fan of Will Smith although I wouldn't say he is the worst actor. I always thought John Wayne was the same in every movie.

Let's see... Paris Hilton is a given, as is Mariah Carey. She should definitely stick to singing. Never really been a fan of Lisa Kudrow's. And can someone explain to me please how Katie Holmes is considered a good actress? I didn't care for her prior to marrying Tom Cruise and nothing's changed. in fact, she's become even more wooden if that's possible. Almost marianette-like in her movements. Don't like Andy Dick--he's supposed to be funny? In what universe? Nick Cannon [aka Mr. Mariah Carey] and Freddie Prinze Jr. [aka Mr. Sarah Michelle Gellar] -- not bad to look at for the most part, will never win Oscars for their work. In fact, they're so bad, they would lower the standards of the Razzies if they won [look it up, people]. Anyone who ever gives Britney Spears another "starring" role should be taken out back and shot, cause they clearly are a danger to themselves and others. Tyrese Gibson -- plays the same character no matter what the role actually calls for and does it badly. Oh man, how did I forget Jessica Simpson?? I change the channel if she's on a COMMERCIAL. Tom Green. 'Nuff said. Let me see, let me see... That's all I got for now, but I'm sure I'll come up with some more that I can add.

I will bundle them together.  All the people in these goofy reality shows that think they are actors and actresses.  Denise Richards for one. Arg. Big Brothers.  Survival shows.  Paris Hilton she was so stilted in a recent movie.

"It's OK to have a little fun sometimes. . . "
A little fun? This could turn into a 200-post extravaganza! I'll get things started with Kris Kristofferson, the most wooden actor to ever plonk around in front of a camera. He and Mud-donna should stick to singing.
Then there are actors who are deemed good by their peers and the paying public, but the very sight of them makes me lunge for the remote. Tom Cruise is one of those for whom I have such a visceral hatred I can't even be objective about his talent.
I'm sure I can come up with more.