On Tuesday (Sept. 10), Dave Grohl stunned fans with the announcement that he’s now the father of a new baby born outside of his marriage to Jordyn Blum.

In a succinct message posted on Instagram, the Foo Fighters frontman got straight to the point. “I’ve recently become the father of a new baby daughter, born outside of my marriage,” Grohl wrote. “I plan to be a loving and supportive parent to her.”

“I love my wife and my children, and I am doing everything I can to regain their trust and earn their forgiveness,” added the former Nirvana drummer, who shares 18-year-old Violet, 15-year-old Harper and 10-year-old Ophelia with Blum. “We’re grateful for your consideration toward all the children involved, as we move forward together.”

Grohl’s team had no further comment.

The musician has been married to Blum since 2003. The couple has chosen to keep their relationship mostly private, but Grohl has been open in the past about how the director and their family keep him grounded through his hectic life.

“For the past 20 years when I’ve been touring, I’ve always craved stability,” he told The Guardian in 2007, back when his oldest daughter was just a baby. “I’ve never gotten off on chaos. Throughout the whole Nirvana experience I retreated to Virginia whenever I felt sucked into the tornado of insanity. Same thing with the Foo Fighters – I wouldn’t be able to do this if I didn’t have my feet planted firmly on the ground. So Jordyn and Violet are anchors that keep me from completely disappearing.”

Prior to his relationship with Blum, Grohl was wed to Jennifer Youngblood. He’s previously been open about how his infidelity in his first marriage led to their divorce in 1997.

See Grohl’s post below.