Los Angeles AP Dave Gro says he recently fathered a daughter outside his 21-year marriage to Jordan Blum with whom he has three older daughters I've recently become the father of a new baby daughter born outside of my marriage I plan to be a loving and supportive parent to her the Foo Fighters frontman and former Nirvana drummer said Tuesday in an Instagram post I love my wife and my children and I'm doing everything I can to regain their trust and earn their forgiveness we're grateful for your consideration toward all the children involved as we move forward together Gro 55 did not share any other details about the baby or her mother and his Representatives declined any comment beyond the posting