- Dec 2 Emmanuel Agyemang-Badu, Ghanaian soccer midfielder (78 caps; Udinese), born in Berekum, Brong-Ahafo, Ghana
- Dec 2 Gastón Ramírez, Uruguayan soccer midfielder (43 caps; Sampdoria), born in Fray Bentos, Uruguay
- Dec 3 Christian Benteke, Belgian soccer striker (93 caps; Genk, Crystal Palace, Liverpool, Aston Villa), born in Kinshasa, Zaire
- Dec 7 Marte Olsbu Røiseland, Norwegian biathlete (Olympic gold women's sprint, pursuit, mixed relay 2022; 11 x World C'ship gold), born in Arendal, Norway
- Dec 12 Victor Moses, Nigerian footballer, born in Lagos, Nigeria
- Dec 19 Sally Fitzgibbons, Australian surfer (ISA World Games gold 2008, 18, 21; WSL World Tour 2010, 11, 12 runner-up), born in Gerroa, Australia
- Dec 22 Josef Newgarden, American auto racer (Indianapolis 500 2023; IndyCar Series 2017, 19; Indy Lights 2011), born in Nashville, Tennessee
- Dec 26 Aaron Ramsey, Welsh footballer, born in Caerphilly, United Kingdom
- Dec 27 Luis Trujillo, Peruvian Football Player
- Dec 27 Milos Raonic, Canadian tennis player (8 ATP titles), born in Titograd, Montenegro
- Dec 30 Joe Root, English cricket batsman and captain (HS 254; Yorkshire CCC), born in Sheffield, England
About December 1990
How Old? 33 years old
Generation: Millennial
Leap Year: No
Chinese Zodiac: Horse
Star Signs: Sagittarius (Nov 22 - Dec 21), Capricorn (Dec 22 - Jan 19)
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions