Tom Cruise bans Victoria Beckham From Giving Katie Holmes Diet Tips

Tom Cruise has told wife Katie Holmes that she can be friends with Victoria Beckham -- as long as the pair don't swap diet tips.

According to a source close to Victoria, the former Spice Girl is delighted her friendship with the former Dawson's Creek star is back on track, but is heeding the warning from Holmes' possessive husband.

Tom reportedly pulled Victoria to one side during a recent chance meeting at a Los Angeles restaurant, and explained why he had ordered Katie to keep her distance.

The source said, "Tom told Posh he was worried how thin Katie was getting, especially as they want to start trying for another baby soon.

"Tom was firm, but polite. He said that, although he understood Posh thought she was only trying to help Katie lose weight after Suri's birth, he didn't want her swapping more diet tips with Katie in the future."

The source also revealed Tom thought Katie was becoming obsessed with her diet and overdoing it with the exercise -- a side of his wife he has never seen before. The 'Top Gun' star apparently believes that if the pair stop talking diets, Katie will put on weight.

"Posh was gracious," the source tells British magazine Closer. "She just wants to hang out with Katie again. When Katie stopped returning her calls and invites, Posh was genuinely upset. She wondered what she had done wrong, and didn't know what to do about it.

"She asked her husband David for advice and even confided in Eva Longoria. Eva just told her to 'keep being herself,' and that whatever was bugging Katie would blow over.

"None of them knew it was Tom's concerns for Katie's health that was behind it all."

And now Beckham is trying her best not to discuss calories around Katie.

Adds the source, "She hasn't mentioned food and diet once around Katie since then.

"And when they've been out for meals together, she's made a real effort not to comment on what everyone's eating and to try to order more food for herself -- even if she doesn't touch it once it's on her plate."