Socialite Nicky Hilton has split from her longterm boyfriend, according to a U.S. report.
The hotel heiress has been dating David Katzenberg, whose father co-founded film studio DreamWorks, for the last four years after meeting as teenagers.
But they have now gone their separate ways due to their hectic schedules, reports New York Post gossip column Page Six.
A source tells the publication, "They broke up quietly after four years together. The main reason was that they have been busy with their work schedules, and it has made it difficult to spend time together.
"Nicky has been back and forth traveling overseas a lot with her business. She has recently been in Asia promoting her jewellery line, and David is starting a new production company. Their schedules never seemed to match.
"There is no scandal or any third person - they remain close friends, they have been friends since they were teenagers."