Is there trouble on the set of Grey's Anatomy?

Maybe. Take this gossip with a grain of salt, since it comes through MSNBC via Star Magazine. But rumor has it that the spinoff of the series that will feature actress Dr. Addison Montgomery (Kate Walsh) has left other cast members feeling blindsided and short-changed.

"The rest of the cast seemed instantly resentful of [Walsh]," a source told Star. "They each thought they'd be the one chosen to get their own show, and now they're giving Kate the cold shoulder."

The source adds that Grey's Anatomy star Ellen Pompeo "seemed particularly peeved because she felt that, as the star, she should have been consulted."

The spinoff news comes just as the controversy regarding fellow cast member Isaiah Washington's inappropriate remarks began to subside.

"Things had finally settled down and now everyone's disgruntled again," the source says.

We don't know how true any of this is. But what we do know, as we reported yesterday, is that a two-hour episode of Grey's Anatomy slated for this spring is what opens the door for Addison's departure.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.