Who was Jim Carrey in Once Bitten?

Jim Carrey was not in the movie "Once Bitten". The character you are thinking of is Mark Metcalf, who played the role of "Mark", a vampire who bites a woman named "Laura" (played by Lauren Hutton).

It's a common mistake to confuse actors, especially since both Jim Carrey and Mark Metcalf have played comedic roles and are known for their physical humor.