The actor has been busy filming the drama in Berlin, Germany but he left the shoot to see his one-month-old daughter in Fulham, West London.
Arriving at the property in a Ferrari, the proud dad told reporters, ""I'm only here for 24 hours. I'm filming in Germany. I've come back to protect my baby.""
Grant's visit came just a day after he confirmed he had become a first-time father following a ""fleeting affair"" with a woman, believed to be former model Tinglan Hong.