Both actors' publicists have confirmed the breakup, with the actress's rep being the more vocal of the two about the matter.
Just last month, the now ex-couple were still practically glued to each other during the "Dr. Seuss' How the Grinch Stole Christmas" premiere in Universal City, Calif.
Now we know why.
Carrey has been prone to falling for his female co-stars. Besides Zellweger, he fell for "Dumb and Dumber" co-star Lauren Holly. The two wed in 1996 and divorced a little less than a year later in July 1997. Before that marriage, Carrey was married to actress Melissa Womer for six years.