Hello! magazine is to appeal against damages awarded to its rival OK! over wedding photos of Catherine Zeta Jones and her husband Michael Douglas.
Catherine Zeta Jones and Michael Douglas wed in New York in 2000
The couple were awarded £14,600 for breach of confidence and £3m in costs after Hello! published paparazzi photos of their wedding.
OK!, which had an exclusive deal with the couple, won £1,033,156.
Hello! is not challenging the award to Ms Zeta Jones and Mr Douglas but said the award to OK! was "far too high".
In January, the Hollywood couple were also awarded £3m of the £4m they had spent suing Hello!
Mr Justice Lindsay ruled that Hello! should pay 75% of the high-profile court hearing into who was to blame and 85% of the costs of the hearing to decide the amount of damages.
In the original case, which ended in November 2003, Mr Justice Lindsay declared Hello! had breached the couple's right of confidence. But he also said there was no law for invasion of privacy.
Hello! solicitor Chris Hutchings said on Thursday the magazine was appealing against the liability and damages costs awarded to OK! because the practice of using "spoilers" to beat a rival's scoop was a common one.
He explained: "This was a spoiler, no different to any other spoiler in the past or since. Hello! has been subject to many spoilers, including ones from OK!"
Mr Hutchings said OK! would also be seeking to appeal against an order that they would get only 75% of their costs of the case.
Zeta Jones and Douglas originally sued Hello! over the magazine's use of "sleazy" photos of their New York wedding in 2000.
The photos were published a few days before the official shots were published in OK!
During the court case, Oscar-winner Zeta Jones told the judge she felt "devastated" and "violated" when she discovered "unflattering" paparazzi pictures had been taken.
OK! got less than the £1.75m it had sought from Hello! but said it was pleased with the £1m result.
The magazine had argued sales of the wedding issue were a "huge disappointment" because its coverage was scuppered by its rival.