And in return for the kind gesture, the Hollywood couple have asked him to be a permanent fixture in the lives of their tots.
Sources tell me thrilled Bono, 48, accepted the offer immediately.
A pal of the parents revealed: "Brad and Angie think the world of Bono"
"Since then, they've become very close, which Brad is thrilled about.
"Angelina is inspired by Bono's humanitarian work and gets on with his wife Ali Hewson. Ali's given Angelina some clothes from her ethical clothing range Edun."
The couple are said to be planning a christening ceremony to welcome Bono into the extended family. But they have not yet decided if he will be sharing his duties with a godmother.
Dad-of-four Bono will do a top job. He's already a godfather to The Edge's daughter Hollie, 24.
And he's got houses in Killiney, Ireland and New York, should the family need another getaway.