United Kingdom, May 29 -- Dennis Quaid has filed a petition to stop paying child support to his ex-wife.

The 72-year-old actor had been handing over $13,750 a month to Kimberly Buffington but now their 18-year-old twins Thomas and Zoe have graduated from high school, he wants the payments to stop.

In documents obtained by People magazine, the Substance actor cited the terms of their 2018 divorce agreement, which noted payments may end "when a child completes 12th grade (if still under 19 and a full-time high school student) or reaches the other enumerated endpoints, whichever occurs first" and highlighted that the twins are set to graduate in May and June this year.

The terms of the divorce show Dennis was required to pay an additional...