Fighting back tears in an interview with BBC Radio 4 the multi-award-winning singer spoke about the special influence his "sensational" one-year-old daughter Teddy has had on him.
"She's difficult to talk about," said the emotional 39-year-old. "Everything I do is for her."
"Every time I open my mouth now in the studio it's a song about her, it would bore people to death but I could do a trilogy of albums about her."
"There's a reason for me to do everything now," added Robbie in the interview which will be broadcast on 11 November. "I wasn't going to have a kid and I wasn't going to get married then I met someone who was amazing and fell in love with her completely and I changed all my thoughts and feelings about that."
Robbie married Ayda in 2010
Robbie, who married Turkish-America actress Ayda Field in 2010 and welcomed baby Teddy on 18 September 2012, also said that his new single Go Gentle is inspired by his daughter, whose full name is Theodora Rose Williams.
"It's a miracle that it has happened because I now get to experience the full gamut of being human," Robbie told presenter John Wilson. "She's a sensational kid."