Katie Holmes upsets actress Diane Kruger?

Katie Holmes has upset actress Diane Kruger.

Holmes called her former flame Joshua Jackson after her divorce," reports the National Enquirer.

"Even though Joshua's relationship with Katie only lasted a year, Diane knows that it burned red-hot," explains a so-called "insider," adding, "I think that bothers Diane deeply."

"That kind of talk will have Diane green-eyed with jealousy," alleges the tab's insider. "I think she wants Katie as far away from her man as possible so she doesn't get a chance to steal him back!"