Stallone and Flavin first met in 1988 at a restaurant in West Hollywood when she was 19, and he was 42.
They later married in 1997 and share three daughters – Sophia, 29, Sistine, 27, and Scarlet, 23.
Stallone was previously married to Sasha Czack from 1974 until 1985, and to Brigitte Nielsen from 1985 until 1987.
He also had son Seargeoh, 44, with Czack, while his eldest son, Sage, died in 2012 at the age of 36.
In recent years, the family opened up their private life through the reality series The Family Stallone, which aired in 2023 and 2024 but has not been renewed for a third season.
The show documented both the couple’s close bond and the tensions that nearly ended their marriage when Flavin filed for divorce in 2022 before the pair reconciled one month later.