Just F Y I is the third foal of Star Act (Street Cry), a winner who was stakes-placed, and her first winner.

Second dam Starrer (Dynaformer) was a multiple Grade 1 winner who won the Grade 1 Santa Margarita Handicap twice. She has four other winners, the best of them the Grade 3-placed Movie Moment (Paynter), and an unraced daughter who is the dam of Uncle Benny. Starrer is a half-sister to Stellar Jayne (Wild Rush), a triple Grade 1 winner, to the winner Emerging Glory (Smarten) and to the unraced Topliner (Thunder Gulch).

Third dam To the Hunt (Relaunch) was twice placed at Grade 3 level.

This is the female family of the multiple Grade 1 winner Stellar Jayne (Wild Rush), the Grade 1 winner Star Billing (Dynaformer), a daughter of Topliner who won the Grade 1 Matriarch Stakes, and Uncle Benny (Declaration of War), a stakes winner and second in the Grade 1 Breeders' Cup Juvenile Turf. Emerging Glory is the dam of the Grade 3 winner The Mailet.

Star Act has a 2023 full sister to Just F Y I and was covered by Life Is Good for 2024.