Are "Twilight" co-stars Robert Pattinson and Kristen Stewart on the rocks?

It has been reveled that K-Stew has been left off the guest list at the Teen Choice Awards on August 8 while her beau is slated to attend with his other "Twilight" co-star Ashley Greene.

It's odd to us that the pair, if in fact still dating, wouldn't appear together.

Some magazines are reporting that KStew just needs some down time, that she is exhausted after doing the rounds with "Twilight; Eclipse" but would you seriously leave your man go to the Teen Choice awards alone?

Not me!

Other stars confirmed to attend the awards are the Kardashian sisters, Sandra Bullock and Leighton Meester

Rumors of a breakup have been rampant for some time.

In fact a source told that RPatz “Now looks really happy, as if someone had lifted a great weight lifted.”