Spencer Pratt has said that Heidi Montag couldn't handle his popularity, which led to their break-up.ontag filed for divorce from Pratt in Santa Monica, Calif. Superior Court.

"Well, some say if you can't handle the heat get out of the kitchen. Heidi couldn't handle King Spencer's fame so she got out of the marriage," Usmagazine.com quoted him as saying.

Montag, 23, cites irreconcilable differences in her petition. She filed for legal separation from Pratt in June.

The Hills stars wed in April 2009.

Indeed, a rep for Montag told: "Heidi is going through a difficult time."

A source close to the couple says that Montag initiated the break-up when she moved out of their home.

"Heidi loves Spencer but she had lost contact with her friends and family," the insider explained.

"This breakup is the latest part of Spencer's master plan," an insider recently told, explaining that the couple is in panic mode now that their MTV reality show has wrapped up.

Another source adds that duo is "laughing over" the break-up headlines "and having a blast." (ANI)