Dennis Quaid and ex-wife attend son’s graduation after actor files to stop paying child support

The co-parent trap.

Dennis Quaid and his ex-wife Kimberly Buffington reunited at their son Thomas’ high school graduation on Wednesday.

While the former couple were seated separately during the ceremony, they put on a united front posing for pictures with the 18-year-old graduate and his twin sister, Zoe.

Buffington, 54, sported a cream tank and skirt set to the event, while her former spouse, 72, suited up for the occasion.

The actor, who spoke at the graduation, attended with wife Laura Savoie, whom he wed in 2020.

The outing came one week after Page Six confirmed Quaid’s filing to terminate his child support payments to Buffington for their kids.

In May court documents, the “Day After Tomorrow” star noted that his 2018 divorce agreement stated payments would end when Thomas and Zoe finished their senior year.

The latter, notably, graduated on May 23.

The Golden Globe nominee’s rep did not respond to Page Six’s request for comment at the time.

Quaid previously asked to have his child support payments lowered in 2020 — only for the sum to be raised “based on the reasonable needs of Thomas and Zoe.”

In addition to the teens, the Emmy nominee is the father of “The Boys” actor Jack Quaid, whom he shares with second wife Meg Ryan.

He and the “When Harry Met Sally” star, 64, both attended their son’s April wedding to Claudia Doumit in Australia.

The exes were married from 1991 to 2001, following Quaid’s first marriage to actress P.J. Soles, a union that ended in divorce in 1983 after five years.

As for his marriage to Buffington, Quaid wed the real estate agent in 2004, with the duo welcoming their twins via surrogate in 2007 before finally calling it quits in 2016 — after multiple separations.

Their divorce was finalized 2018.

Quaid and his fourth wife have a 39-year age gap, which the “Far From Heaven” star dismissed in a 2019 Guardian interview.

“It really doesn’t bother us,” he insisted, denying he went “out looking” for a younger woman. “You have no control over who you fall in love with. … I can’t let what a few people think control all that.”