The 42-year-old actor became a dad for the first time when Duell gave birth to their little boy last week, in Hawaii.
People.com reports they have named their new son Robert Ford Wilson – and not Ford Linton Wilson, as some earlier reports had erroneously claimed.
Neither Wilson or his girlfriend have spoken publicly about the new arrival since the birth on 14 January, but his co-star in upcoming movie Hall Pass, Carly Craig, recently said the Little Fockers star would be a “good dad” as he's a “normal sweet guy”.
The couple have been dating for around a year and reportedly chose to keep Duell's pregnancy a secret.