Stewart and Pattinson 'on the rocks'

Kristen Stewart is reportedly unhappy about Robert Pattinson's relationship with his agent Stephanie Ritz.

Stewart is apparently worried that Pattinson is getting "too close" to Ritz and feels threatened.

A source close to the couple told the National Enquirer that their relationship is "on the rocks" after Stewart became "resentful of [Pattinson's] friendship with his much older agent Stephanie Ritz".

The insider added: "Rob and Stephanie have always been close, and Kristen is uncomfortable with it."

It was recently reported that Pattinson is jealous of Stewart's On The Road co-star Tom Sturridge.