- Jan 4 Gage Munroe, Canadian actor (I Declare War), born in Toronto, Ontario
- Jan 10 Mason Mount, English footballer (England, Chelsea FC), born in Portsmouth, England
- Jan 13 Nasa Hataoka, Japanese golfer (Women's PGA C'ship 2018 runner-up), born in Ibaraki, Japan
- Jan 14 Declan Rice, English footballer (Arsenal, England), born in Kingston upon Thames, England
- Jan 18 Karan Brar, American actor (Diary of a Wimpy Kid; Bunk'd), born in Redmond, Washington
- Jan 19 Christone “Kingfish” Ingram, American blues guitarist and singer (662), born in Clarksdale, Mississippi
- Jan 29 Madison Bailey, American actress (Outer Banks), born in Kernersville, North Carolina
- Feb 7 Bea Miller, American pop singer ("Feel Something") and actress, born in Maplewood, New Jersey
- Feb 16 Marie Ulven, Norwegian alt-pop-rock singer-songwriter, guitarist, and record producer (girl in red), born in Horten, Norway
Luka Dončić (25 years old)
Feb 28 Slovenian basketball guard (EuroLeague MVP 2018; NBA Rookie of the Year 2019; Dallas Mavericks), born in Ljubljana, Slovenia
Janja Garnbret (25 years old)
Mar 12 Slovenian competitive climber, born in Slovenj Gradec, Slovenia
- Mar 13 Wiktoria Gąsiewska, Polish actress, born in Warsaw, Poland
- Mar 14 Marvin Bagley III, American NBA player (Detroit Pistons), born in Temple, Arizona
- Mar 14 Olivia Dean, English singer-songwriter (Imperfect), born in London, England
- Mar 19 Tatum McCann, American actress
- Mar 23 Prince Beltran of Bulgaria
- Apr 2 Audrey Nuna [Chu], Korean-American R&B singer and rapper ("Comic Sans"), born in New Jersey
- Apr 3 Sam Kiszka, American bass player (Greta Van Fleet), born in Frankenmuth, Michigan
- Apr 4 Sheku Kanneh-Mason, British classical cellist (Chineke! Orchestra; The Kanneh-Masons), born in Nottingham, England
- Apr 7 Ally Venable, American blues-rock guitar player, singer-songwriter (Texas Honey), born in Kilgore, Texas
- Apr 8 CeeDee Lamb, American NFL wide receiver. 2020- (3 x Pro Bowl, Dallas Cowboys), born in Opelousas, Louisiana
- Apr 8 Isaac Hempstead Wright, English actor (Bran in Game of Thrones), born in Surrey, England
Lil Nas X (25 years old)
Apr 9 American singer-songwriter and rapper (Old Town Road), born in Lithia Springs, Georgia
- Apr 14 Chase Young, American NFL player (Washington Commanders), born in Upper Marlboro, Maryland
- Apr 23 Claud [Mintz], American indie-pop singer-songwriter ("Soft Spot'; "A Good Thing"), born in Highland Park, Illinois
- Apr 23 Laufey [Jónsdóttir], Icelandic-Chinese jazz-pop singer-songwriter, guitarist, and cello player, born in Reykjavík, Iceland
- May 3 Tom Hartley, English cricket spin bowler (Test BB 7/62 v India 2024; Lancashire CCC), born in Ormskirk, England
- May 5 Nathan Chen, American figure skater (Olympic Gold 2022), born in Salt Lake City, Utah
- May 10 Nadia Ferreira, Paraguayan fashion model and beauty queen (Miss Paraguay, 2021), born in Villarrica, Paraguay
- May 11 Sabrina Carpenter, American actress (Girl Meets World) and singer, born in Lehigh Valley, Pennsylvania
- May 23 James Charles [Dickinson], American internet personality and model (Cover Girl), born in Bethlehem, New York
- May 25 Brec Bassinger, American actress (Stargirl), born in Saginaw, Texas
- May 27 Lily-Rose Depp, French-American singer and actress (The Dancer), born in Neuilly-sur-Seine, France
- May 28 Cameron Boyce, American actor (Mirrors, Jessie), born in North Hollywood, California (d. 2019)
- May 30 Guanyu Zhou, Chinese racing driver (first Chinese F1 driver), born in Shanghai, China
- May 30 Sean Giambrone, American actor (The Goldbergs - "Adam"), born in St. Joseph, Michigan
- Jun 11 Kai Havertz, German football player (Arsenal), born in Aachen, Germany
- Jun 15 Peso Pluma [Hassan Laija], Mexican corridos singer, rapper, and guitarist ("Ella Baila Sola"), born in Zapopan, Mexico
- Jun 16 Justin Jefferson, American NFL player (Minnesota Vikings), born in St. Rose, Louisiana
- Jun 16 Snail Mail [Linsey Jordan], American indie-rock guitarist and singer-songwriter, born in Ellicott City, Maryland
- Jun 17 Elena Rybakina, Kazakhstani tennis player (Wimbledon women's singles 2022), born in Moscow, Russia
- Jun 27 Chandler Riggs, American actor (The Walking Dead), born in Atlanta, Georgia
- Jun 28 Markéta Vondroušová, Czech tennis player (Wimbledon singles 2023; French Open 2019 runner-up), born in Sokolov, Czech Republic
- Jul 20 Pop Smoke [Bashar Barakah Jackson], American rapper and singer-songwriter (Shoot for the Stars, Aim for the Moon), born in Brooklyn, New York (d. 2020)
- Jul 20 Princess Alexandra of Hanover, daughter of Princess Caroline of Monaco
- Jul 28 GloRilla [Gloria Woods], American rapper (F.N.F. (Let's Go)), born in Memphis, Tennessee
- Jul 30 Joey King, American actress (The Kissing Booth, The Act), born in Los Angeles, California
- Aug 2 Mark Lee, Canadian rapper and singer (NCT; SuperM), born in Toronto, Ontario
- Aug 3 Brahim Díaz, Spanish footballer (Real Madrid), born in Málaga, Spain
- Aug 3 Zach Wilson, American NFL quarterback (NY Jets), born in Draper, Utah
- Aug 7 Sydney McLaughlin, American hurdler and sprinter, born in New Brunswick, New Jersey
- Aug 10 Ja Morant, American NBA player (Memphis Grizzlies), born in Dalzell, South Carolina
- Aug 12 Matthijs de Ligt, Dutch football player (Bayern Munich, Netherlands), born in Leiderdorp, Netherlands
- Aug 19 Ethan Cutkosky, American actor (Shameless), born in St. Charles, Illinois
- Aug 28 Prince Nikolai of Denmark, born in Copenhagen, Denmark
- Aug 31 Shamar Joseph, West Indian cricket fast bowler (Test BB 7/68 v Australia 2024; Guyana), born in Baracara, Guyana
- Sep 8 Shubman Gill, Indian cricketer (Gujarat Titans, India), born in Farzilka, Punjab, India
- Sep 13 Destiny Rogers, American pop and R&B singer ("Tomboy"), born in Lodi, California
- Sep 22 Kim Yoo-jung, South Korean actress (20th Century Girl), born in Seoul, South Korea
- Sep 28 Olivia Jade Giannulli, American Youtuber (daughter of Mossimo Giannulli and Lori Loughlin)
- Sep 29 Juan Valentín Urdangarín y de Borbón, Spanish royal, son of Infanta Cristina de Borbon, born in Barcelona, Spain
- Oct 11 Patty Tavatanakit, Thai golfer (ANA Inspiration 2021; LPGA Tour Rookie of the Year 2021), born in Bangkok, Thailand
NBA YoungBoy (24 years old)
Oct 20 American rapper ("Bandit"; Tyler the Creator -"WusYaName"), born in Baton Rouge, Louisiana
- Oct 31 Ludvig Åberg, Swedish golfer who was runner-up in Masters Tournament 2024, born in Eslöv, Sweden
- Nov 6 Robert Finke, American swimmer (Olympic gold men's 800/1,500m 2020), born in Tampa, Florida
- Nov 10 (Armand) "Mondo" Duplantis, American-Swedish athlete (Olympic gold pole vault 2020; World C'ship gold 2019; WR 6.18m), born in Lafayette, Louisiana
Kiernan Shipka (24 years old)
Nov 10 American actress (Sally Draper -Mad Men), born in Chicago, Illinois
- Nov 11 Samara Joy [McLendon], American jazz singer, born in Bronx, New York
- Nov 13 Lando Norris, British auto racer (Karting World C'ship 2014; FIA Formula 3 European C'ship 2017; McLaren F1 2018- ), born in Bristol, England
- Nov 20 Prince Umberto of Bulgaria, titular Bulgarian royal family
- Nov 20 Princess Sofia of Bulgaria, titular Bulgarian royal family
- Nov 28 Hinata Miyazawa, Japanese football player (Mynavi Sendai, Japan), born in Minamiashigara, Japan
- Dec 16 Ethan Dolan, American Vine and YouTube star with twin brother Grayson, born in New Jersey
- Dec 16 Grayson Dolan, American Vine and YouTube star with twin brother Ethan, born in New Jersey
- Dec 17 Holly Humberstone, English singer-songwriter ("The Walls Are Way Too Thin"), born in Grantham, England
- Dec 27 Brock Purdy, American football quarterback for the San Francisco 49ers, born in Queen Creek, Arizona
About 1999
How Old? 24 or 25 years old
Generation: Generation Z