The duo of Steven Tyler and Joe Perry have been called the Toxic Twins for years, but now you can call the Aerosmith pair the toxic-grandfathers too.

The longtime bandmates both welcomed grandchildren on the same day (05/11/17), according to Aerosmith‘s social media outlets. Tyler welcomed a grandson to his family and Perry commemorating the birth of a granddaughter.

“Congrats to Steven Tyler and Joe Perry on the birth of their new grandchildren. Both born today!” begins the post. “How cool is that! The newest member of the Tyler family is a beautiful little boy, 7 lbs 11 oz born at 5:45 am. The newest member of the Perry family is a beautiful little girl, 6 lbs 9 oz born at 2:11 pm. Let’s give them a huge #BlueArmy welcome.”

The bundles of joy come just mere days before the duo embark on the Aerosmith “Aero-Vederci Baby!” tour.

Aerosmith have postponed the American Leg of their upcoming tour to work on a new album.

The band has spent months talking about what could be their final tour, the Aero-Vederci Baby! tour. However, the plans to bring the tour this fall to North America has been shelved. According to Joe Perry, that’s two release more material, before hitting the road to tour until it’s over.

“We postponed the American tour we were supposed to do this fall,” he told AZ Central. “And we’re gonna go out and tour until we’re done. And we’re gonna try and hit every place we’ve ever played and never played. There’s always new places to go. New countries. I’d like to play China and the Far East. There’s a lot of places that are off the beaten path. Is this the last tour? Well, I don’t know. I don’t think so.”

Aerosmith will still play their oversea dates that start in May and keep them busy until July.

Perry said “one of the reasons we postponed [the American] tour” was to “give ourselves some time to get something done. We definitely have another record in us, if not two. But we’ll see how that goes.”

Though stating that the upcoming tour will be extensive, he couldn’t comment about it being their final tour. When asked by AZ Central if this will be a farewell tour, he said, “Not officially, no.”

“Try and picture your last meal,” he explained. “You’re only gonna eat so many times in your life. You’re gonna sit down at the table 258 million times. There’s a finite number of times you’re gonna do anything in your life. To picture a final Aerosmith gig, it’s like … I can’t do it. There’s too much of that ‘rock until you drop’ ingrained into this band. But like I said, we’re at the end, so who knows how long it’s gonna go?”