Famous People Born in April

Dame Valerie Jane Morris Goodall was an English primatologist and anthropologist. Regarded as a pioneer in primate ethology, and described by many publications as "the world's preeminent chimpanzee expert", she was best known for more than six decades of field research on the social and family life of wild chimpanzees in the Kasakela chimpanzee community at Gombe Stream National Park in Tanzania. Beginning in 1960, under the mentorship of the palaeontologist Louis Leakey, Goodall's research demonstrated that chimpanzees share many key traits with humans, such as using tools, having complex emotions, forming lasting social bonds, engaging in organised warfare, and passing on knowledge across generations, which redefined the traditional view that humans are uniquely different from other animals.

Maya Angelou was an American memoirist, essayist, poet, and civil rights activist. She published seven autobiographies, three books of essays, several books of poetry, and is credited with a list of plays, movies, and television shows spanning over 50 years. She received dozens of awards and more than 50 honorary degrees. Angelou's series of seven autobiographies focus on her childhood and early adult experiences. The first, I Know Why the Caged Bird Sings (1969), tells of her life up to the age of 17 and brought her international recognition and acclaim.

Robert John Downey Jr. is an American actor and producer. His films as a leading actor have grossed over $14.3 billion worldwide, making him one of the highest-grossing actors of all time. Downey was the highest-paid actor in the world annually from 2013 to 2015. Known for his versatility across roles, he is the recipient of various accolades, including an Academy Award, a Daytime Emmy Award, three Golden Globe Awards, and two British Academy Film Awards.

Leonardo di ser Piero da Vinci was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he has also become known for his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and palaeontology. Leonardo is widely regarded as a genius who epitomised the Renaissance humanist ideal, and his collective works contributed to the development of European art to an extent rivalled only by that of his younger contemporary Michelangelo.

Emma Charlotte Duerre Watson is an English actress. In the 2010s, she was ranked among the world's highest-paid actresses by Forbes and Vanity Fair, and was named one of the 100 most influential people in the world by Time magazine in 2015.