AJ McLean reunited with his estranged wife Rochelle DeAnna McLean at the opening night of the Backstreet Boys' residency at the Sphere in Las Vegas

Captioning a selfie of the joyous-looking family backstage on Instagram on July 12, Rochelle, 43, wrote: "Opening night @spherevegas was really something special.

"All I can say is that it is really something you have to see for yourself.

"Bravo boys! You, your team and your crew pulled off the most spectacular show I've ever seen!"

Rochelle - who like Elliot and Lyric were dressed in an all-white outfit - tagged AJ and the Backstreet Boys in the post.

The I Want It That Way hitmaker fuelled his love for Rochelle and their daughters in the post's comments section.

AJ, 47, penned: "I love you all so much,' he wrote. 'It wouldn't have been the same if my girls weren't there to kick off this amazing residency!"

The photo carousel - of which the cover image was the selfie - also featured images of a proud Rochelle, Elliot and Lyric sitting in their seats during the show.

Rochelle also shared photos of the futuristic-looking stage, as well as various points of the '90s pop band's two-hour show.

The Backstreet Boys - completed by Kevin Richardson, 53, Howie Dorough, 51, Brian Littrell, 50, Nick Carter, 45, and AJ - began their Las Vegas residency on July 11, and it ends on August 24.

Since 2024, AJ and Rochelle have been co-parenting Elliot and Lyric, and the performer said in June that the family is "doing good".

AJ told Us Weekly: "We are coparenting to the best of our ability, and we both have a lot of growing to kind of still go through, but I think we are moving in a really positive direction.

"We have a family together that's obviously not going anywhere.

"We have been spending a lot of time together as a family and, you know, her and I going out on dates here and there."