Lea Michele’s alleged “diva” behaviour reportedly caused her publicist swap.

The Glee star has been with PR firm ID for a decade, but recently signed with Kim Kardashian’s former publicist Jill Fritzo.

But according to sources, the split wasn’t all on Lea’s terms, and the 27-year-old’s attitude was also a factor.

“She was refusing to do things they had lined up for her because of her ‘busy schedule’ filming Glee,” a source told Page Six.

“She was saying that [Glee creator] Ryan Murphy was the only one who could make her do certain appearances.”

However both parties were professional and complimentary to each other in their respective statements.

While Lea spoke of how “grateful” she was for all the work she did with ID over the last decade, the PR firm wished the actress luck with her future endeavours.

“We’re proud of our accomplishments during our long collaboration with Lea, and wish her only the best,” the publication reports an ID representative as saying.

It isn’t the first time Lea, who plays Rachel Berry on the popular Fox series, has been accused of being a diva.

In fact, ever since the show began in 2009, rumours have circulated she is hard to work with on set.

But the star, who is preparing to release her first solo album Louder, has shot down the allegations in a number of magazine interviews.

“I can assure you that [the diva rumours] aren’t real,” she told Marie Claire in 2012. “It’s super-frustrating sometimes, and I used to fight back, but now I feel like, ‘You can think what you want about me.’”