Reason behind Cooper-Zellweger split revealed

Bradley Cooper and Renee Zellweger were going strong for two years and then they unceremoniously split. Buzz is that Cooper's rising career is considered as the reason behind his split with Zellweger.

Actor Bradley Cooper's rising career is considered as the reason behind his split with actress Renee Zellweger.

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"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

dailymail.co.uk

quoted a friend of Cooper and Zellweger as saying.

Cooper's career has witnessed a rise since he starred in a hit comedy

The Hangover

and

Limitless

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

.