Drew Barrymore and Will Kopelman knew they were going to name their firstborn Olive six months before before her Sept. 26, 2012 arrival. "I never would have guessed that would have been the name. But I was reading a book with my husband, and I was three months pregnant. They said your baby is the size of an Olive and that was it," Barrymore said on The Ellen DeGeneres Show. "We never looked back."