Katie Holmes is finding it hard not to give daughter Suri everything she wants.

The former 'Dawson's Creek' actress - who was given primary custody of the six-year-old tot as part of her divorce settlement from ex-husband Tom Cruise - knows it's important Suri is not spoilt but has told friends it's not easy telling her no because Tom is happy to indulge in his daughter's every whim.

One said: ''She said the divorce has been hard on Suri and she's acting out. Katie says no to some things, but gives a little leeway. She knows Tom is going to spoil her.''

While Katie wants Suri to stay grounded, it was recently revealed Tom had set up a ''sizeable trust fund'' for the little girl.

The 'Top Gun' actor - who is giving his former spouse $400,000 per year in child support until Suri turns 18 - has created the additional payment plan for the youngster upon Katie's request, although the youngster will be unable to fully legally claim the money until she's in her 30s.

A source said: ''Katie wanted the trust fund put in place for Suri so that their daughter will be able to tap into after she turns 18 years old.

''Katie has absolutely no access to the money and didn't want to. She just wanted to ensure that Suri would have financial security as she becomes an adult. It's a sizable trust fund, but Suri won't be able to fully legally claim it until she is in her 30s.

''Tom had no problem with the request and planned on doing it for Suri anyway.''