Welcome to the world, Baby Fisher Cohen! Isla Fisher and husband Sacha Baron Cohen have just added to their brood. The Australian actress has given birth to the couple's third child today, Us Weekly reports. Details about the baby's birth, including its sex and name, have not yet been made public. Us Weekly reports that the pregnant star attended a private party yesterday — just hours before giving birth. She and her comic actor husband announced the pregnancy in October, and the baby has already been making the Hollywood rounds. It was even spied schmoozing with Jennifer Aniston (in utero) at this year's Oscars. Fisher and Baron Cohen are already parents to two daughters, 7-year-old Olive and 4-year-old Elula. So long as the new kid isn't named Borat, we're over the moon.