- Jul 3 Julie Klausner, American comedian, screenwriter, actress (Difficult People), podcaster, and author, born in New York City
- Jul 3 Katia Zygouli, Greek supermodel, born in Thessaloniki, Greece
- Jul 4 Becki Newton, American actress, born in New Haven, Connecticut
- Jul 4 Vicky Kaya, Greek supermodel and actress, born in Athens, Greece
- Jul 6 Tamera Mowry, American twin actress (Sister, sister), born in Gelnhausen, West Germany
- Jul 6 Tia Mowry, American twin actress (Sister, sister), born in Gelnhausen, West Germany
- Jul 9 Linda Park, Korean-born American actress (Stra Trek: Enterprise), born in Seoul, South Korea
- Jul 12 (Christopher) "Topher" Grace, American stage and screen actor (That '70s Show -"Eric"; In Good Company; Home Economics), born in New York City
- Jul 12 Claire Chitham, New Zealand actress known for "Shortland Street", born in Auckland, New Zealand
- Jul 12 Michelle Rodriguez, American actress (Girlfight, Fast and Furious), born in San Antonio, Texas
- Jul 17 Justine Triet, French filmmaker (Anatomy of a Fall), born in Fécamp, France
- Jul 17 Katharine Towne, American actress, born in Los Angeles, California
- Jul 17 Mike Hettinga, American professional wrestler, born in San Bernardino, California
- Jul 18 Eugene Cordero, American comedian, actor, and writer (Star Trek: Lower Decks; Loki), born in Detroit, Michigan
- Jul 18 Mélissa Theuriau, French newscaster for M6, born in Échirolles, France
- Jul 20 Charlie Korsmo, American child actor (Dick Tracy, Hook), born in Fargo, North Dakota
- Jul 20 Elliott Yamin, American singer-songwriter (American Idol, 2007; "Wait for You"), born in Los Angeles, California
- Jul 21 Josh Hartnett, American actor (Black Hawk Down) and movie producer (August), born in St. Paul, Minnesota
- Jul 21 Justin Bartha, American actor (National Treasure films), born in Fort Lauderdale, Florida
- Jul 22 A. J. Cook, Canadian actress, known for "Criminal Minds", born in Oshawa, Ontario
- Jul 31 Zeta Makripoulia, Greek actress, model and TV presenter
About July 1978
How Old? 46 years old
Generation: Generation X
Leap Year: No