Catfight! Are sitcom sweethearts Tina Fey and Jennifer Aniston bitter foes?

RadarOnline.com is reporting that the two actress are feuding because they’re both nominated for outstanding guest actress in a comedy at the 2009 Emmy Awards.

Tina was nominated for her much-talked-about impersonation of Sarah Palin on Saturday Night Live during the 2008 US presidential election, while Jennifer received a nomination for outstanding guest appearance for her spot on NBC’s 30 Rock as Tina Fey’s old college roommate-turned-Jack’s-psycho stalker. This is Jennifer’s first Emmy nom since Friends, which ended in 2004

“Jen was so excited to be nominated, she’s been talking about it for months,” RadarOnline quotes an unnamed source as saying. “But she’s really disappointed to be going up against Tina. She realizes it’s going to be near to impossible to win now.”

The friendship between Fey and Aniston has become so strained, they women “hardly talk” anymore.

“[Tina] just can’t understand why Jen would be giving her the cold shoulder over something so trivial,” the source reportedly said.

Fey, who stars as Liz Lemon in the critically acclaimed 30 Rock, won the Emmy Award for best actress in a comedy in 2008. In 2002, Aniston won the same award for her role as Rachel on Friends.