Jennifer Aniston - looking seriousGrieving JenBrad Pitt has cancelled all forthcoming engagements to rush back to the side of grieving wife Jennifer Aniston.  

Friends star Jen is said to be devastated after the death of a mystery close pal.

Brad was in London promoting new movie Ocean's Twelve but has even called off a posh party to celebrate his 41st birthday.  

The Sun reports that little is known about Jen's friend, but they were said to be close for a number of years.  

It also quashes rumours that the couple are set to split following claims Brad was getting close to Angelina Jolie.  

A source said: "Brad just wants to help her through this rough time. His career is important but Jennifer comes first.  

"He wants to have a family with Jennifer - they love each other very much."