GWEN STEFANI and GAVIN ROSSDALE's oldest son KINGSTON is slowly adapting to his role as big brother - and is starting to understand he isn't the only baby in his parents' life.
The couple welcomed second child ZUMA into their family in August, but Rossdale insists two year old Kingston is handling the situation well.
He says: "It's like, here is this guy, and he's not leaving. He (Kingston) is getting used to that.
"Obviously, there are moments that he's bugged out that someone is in his spot with his mum. His mum is great, so I agree with that. I just can't complain about it. I think it's just natural. That's what happens."
Gavin admits that although having two young children can be a handful, they are enjoying every minute of it.
He jokes, "One is one, and two is 10. That's all I know! It's going really well. It's not so bad. We've got it down now, you know."
And the celebrity couple is already preparing baby Zuma for his first Halloween.
Describing his kids' costumes, Gavin says: "One's an elephant, and one's a shark. Zuma's the shark."