His mouth was made for talkin’.

Nick Lachey revealed that he, his wife Vanessa Lachey, and their three kids sat in first class near his ex-wife, Jessica Simpson, while on a six-hour flight to Hawaii in March.

Meanwhile, Nick’s former “Newlyweds” co-star’s children flew in economy, according to the 98 Degrees member.

Nick explained while on Wednesday’s episode of “Watch What Happens Live” that Simpson was with his “former mother-in-law,” Tina Ann Drew.

“I believe her kids and her — I’m not familiar with where they stand, but — her husband, maybe, were on the plane but not with us,” the “Perfect Match” host continued.

Host Andy Cohen then inquired if Simpson and estranged husband Eric Johnson’s little ones — daughter Maxwell, 14, son Ace, 12, and daughter Birdie, 7 — were “in a separate class of service.”

Nick confirmed they were.

When news first broke of the singer, 52, and fashion designer’s run-in, TMZ alleged that Simpson, 45, switched seats with a fellow passenger to be further away from her ex, 46.

Despite Cohen’s questioning, Nick noted that the reunion was “strangely OK,” adding that “it’s been 20 years” since the pair was married.

“We hadn’t seen each other in those 20 years, then spent six and a half hours on a flight to Hawaii together,” the musician mused, before quickly clarifying that he and Simpson were simply “in the same vicinity.”

Nick shared that, “everyone was very, very cordial” and “very respectful.”

A rep for Simpson didn’t immediately respond to Page Six’s request for comment.

Simpson, meanwhile, married Johnson in 2014 before calling it quits in 2025.