07/29/2011 09:33 am ET Updated Sep 28, 2011

Bye Bye: Nicky Hilton, David Katzenberg Split

Following a string of bad break-up news this week, Nicky Hilton and her boyfriend of four years, David Katzenberg (son of DreamWorks boss Jeffrey) have gone their separate ways. According to the New York Post, the break-up was the inevitable result of too little time spent together, too much work.

"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," a source told the Post.

Read more: New York Post