Johann Carl Friedrich Gauss (/ɡaʊs/; German: Gauß [ˈkaʁl ˈfʁiːdʁɪç ˈɡaʊs] (listen); Latin: Carolus Fridericus Gauss; 30 April 1777 – 23 February 1855) was a German mathematician and physicist who made significant contributions to many fields in mathematics and sciences. Sometimes referred to as the Princeps mathematicorum (Latin for "the foremost of mathematicians") and "the greatest mathematician since antiquity", Gauss had an exceptional influence in many fields of mathematics and science, and is ranked among history's most influential mathematicians.

Stephen Joseph Harper PC (born April 30, 1959) is a Canadian economist and retired politician who served as the 22nd prime minister of Canada for nearly a decade, from February 6, 2006, to November 4, 2015. Harper has served as the leader of the International Democrat Union since February 2018.

John Mark Galecki (born April 30, 1975) is an American actor. He played Leonard Hofstadter in the CBS sitcom The Big Bang Theory (2007–2019) and David Healy in the ABC sitcom Roseanne (1992–1997; 2018). Galecki also appeared in the films National Lampoon's Christmas Vacation (1989), Prancer (1989), Suicide Kings (1997), I Know What You Did Last Summer (1997), Bookies (2003), In Time (2011), and Rings (2017).

Kirsten Caroline Dunst (/ˈkɪərstən/; born April 30, 1982) is an American actress. She made her debut in the 1989 anthology film New York Stories, appearing in the segment Oedipus Wrecks directed by Woody Allen. At the age of twelve, Dunst gained widespread recognition as Claudia in Interview with the Vampire (1994), for which she was nominated for a Golden Globe for Best Supporting Actress. She appeared in Little Women the same year and in Jumanji the following year. After a recurring role on the third season of ER (1996–1997), and appearances in films such as Wag the Dog (1997), Small Soldiers (1998), the 1998 English dub of Kiki's Delivery Service (1989) and The Virgin Suicides (1999), Dunst starred in a string of comedies, including Drop Dead Gorgeous, Dick (both 1999), Bring It On (2000), Get Over It, and Crazy/Beautiful (both 2001).

Gal Gadot Varsano (Hebrew: גל גדות‎, [ˈɡal ɡaˈdot]; born 30 April 1985) is an Israeli actress and model. At age 18, she was crowned Miss Israel 2004. She then served two years in the Israel Defense Forces as a combat instructor, and she began studying law and international relations at IDC Herzliya college while building up her modeling and acting careers.

Dianna Elise Agron (/ˈeɪɡrɒn/; born April 30, 1986) is an American actress, singer, and dancer. In 2006, Agron made her television debut as Jessica Grant on CSI: NY. From 2006 to 2007, Agron had recurring roles on Veronica Mars as Jenny Budosh, and Heroes as Debbie Marshall.