"She's finally here!! our little celestial seed 🥹💓 ... This marks Fox's fourth child after having three children with actor and "Beverly Hills, 90210" alum Brian Austin Green.

her first child with former fiancé Machine Gun Kelly, the rocker shared in a touching announcement revealing the duo now share a daughter. "She’s finally here!! our little celestial seed," MGK ...

The caption read: "She’s finally here!! Our little celestial seed 🥹 ... and singer allegedly demanded Green "stop asking when our child is gonna be born," insisting he's "the FEDS." ...