The 36-year-old soccer star says 3-month old Harper Seven is already sleeping through the night and is "a lot calmer" than his boys were at that age.
Besides baby Harper, Beckham and wife Victoria are parents to sons Brooklyn, Romeo and Cruz.
Harper's three brothers are also on dad's side when it comes to her eventual dating life. Beckham says he plans to be "overprotective in every way possible" and his sons will be "exactly the same." He says his boys will take her to and from her dates, and he will answer the door when she gets home.
He talked about Harper while promoting his new fragrance, Homme by David Beckham, recently in Beverly Hills.