Actor Bradley Cooper's rising career is considered as the reason behind his split with actress Renee Zellweger.
"If I had to pick any possible mistress, it would be Brad's career. He worked really hard to get into leading man status," the
quoted a friend of Cooper and Zellweger as saying.
Cooper's career has witnessed a rise since he starred in a hit comedy
which topped the US box office and took in $19 million.
"She tried to make it work. But in the end it was too hard. Her friends feel bad it ended, but she's okay," one of Renee's friends told U S magazine.
The couple had parted ways just days after 36-year-old Cooper paid tribute to Zellweger, 41, during a interview on biographical series
Inside The Actor's Studio