Katie Holmes has joined the growing ranks of former Tom Cruise fans, according to a new report.

After the actress failed to show at the Scientology Celebrity Centre’s 39th Anniversary Gala in Los Angeles, rumours surfaced that the couple’s marriage is in crisis.

Two days later, however, Katie played the dutiful wife, flying to 46-year-old Tom’s side in LA for the premiere of his latest movie Tropic Thunder, in which he only has a minor part.

“Tom was clinging to Katie, which is no surprise – she’s been his rock these past few months," Now quotes a source as saying.

"He can no longer command top fees for his movies as his name isn’t a guarantee of box-office success any more and that’s hit his confidence hard.

"So much so that he even considered giving up acting at one point.”

The Mission Impossible actor was once the talk of Hollywood, but his heartthrob status has since taken a battering - even with wife, Katie, apparently.

"At the premiere, they seemed mismatched. Katie looked every inch the glamorous starlet, while Tom looked needy, diminished and much older," the source adds.

"It remains to be seen whether their marriage can weather this storm."