Dennis Quaid and Kimberly Buffington Divorcing

Another celebrity couple is headed to Splitsville. The last time they made big headlines, Dennis Quaid and his wife Kimberly Buffington were going after the pharmaceutical industry after their infant twins almost died from a massive overdose of Heparin shortly after their birth in 2008.

Now, four years later, The Quaids are in the news again: This time because Buffington has filed a divorce petition to end their seven-year marriage.

“The marriage has become insupportable because of discord or conflict of personalities … that destroys the legitimate ends of the marriage relationship and prevents any reasonable expectation of reconciliation,” reads a passage from the petition, which was obtained by TMZ.

There is a temporary custody order in place for the Quaid twins, Thomas Boone and Zoe Grace, 4. The court order gives Kimberly possession of the estranged family’s main residence and the Mercedes. Dennis gets the Cadillac Escalade and a condo.

The exes have to “cooperate” over use of the Range Rover.

Kimberly is asking that their community assets be fairly divided. Dennis has asked the court to block that request. Both Kimberly and Dennis are ordered not to say anything “vulgar, profane, obscene or indecent” to each other.

The divorce will be the third for Dennis. The actress divorced actress Meg Ryan in 2001. Quaid and actress P.J. Soles split in 1983.