Sylvester Stallone's Daughter Says Dates Don't Return After Meeting Her Dad: "He's Just So Scary"

Sylvester and Czack's first son, Sage Moonblood, was born on May 5, 1976, in Los Angeles. At just 14 years old, Sage made his acting debut in the 1990 film "Rocky V" as his father's onscreen son, Rocky Balboa Jr. After getting his first taste at acting, Sage went on to study filmmaking at the University of North Carolina School of the Arts.

In 1996, he and his father became costars once again when they both appeared in the film "Daylight." Sage also appeared in a number of other films, like "Chaos," "Moscow Zero," and "Promises Written in Water."

One of Sage's most notable projects came in 2006 when he directed, wrote, and produced the short film "Vic," which earned him the best new filmmaker award at the Boston Film Festival that year. In 2010, he also appeared in the short film "The Agent." The role marked Sage's final acting project before he died on July 13, 2012.

"Sage was our first child and the centre of our universe and I am humbly begging for all to have my son's memory and soul left in peace," the actor told TMZ at the time. It was revealed weeks later that Sage died of heart disease, per People.

Sylvester and Czack also share a son named Seargeoh. He was born three years after Sage in 1979, although his exact birth date is unknown. At just 3 years old, Seargeoh joined his father on the cover of People in 1982 around the same time that "Rocky III" was released.

In a June 1985 interview with the magazine, Sylvester revealed his son was diagnosed with autism, which inspired him and Czack to launch a research fund under the National Society for Children and Adults With Autism. Sylvester said he used his film premieres to raise money for the fund.

Sylvester and his third wife, Flavin, welcomed their first daughter, Sophia, on Aug. 27, 1996, in Miami, FL. After Sophia graduated from the the University of Southern California in May 2019, she went on to launch a podcast with her sister, Sistine, called "Unwaxed," which is available to stream on YouTube, Spotify, and Apple Podcasts. According to the podcast's description on YouTube, the show is named after the idea that the sisters are "baring it all" by discussing everything "from adulting to single life."

Besides that, Sophia runs the Instagram account @favouritebookclub, which is dedicated to book recommendations and reviews. Apparently, Sophia got her love of reading from her dad. In a 2012 interview with Paris Match, Sophia's mom said that like Sylvester, Sophia "has read nearly all of Shakespeare's books."

Sistine is Sylvester and Flavin's second oldest daughter. She was born on June 27, 1998, in Los Angeles. Despite coming from a famous family, Sistine has made a name for herself by becoming a successful model and actor. In December 2016, she walked the runway at Chanel's annual Métiers d'Art show. She also appeared on the November 2017 cover of Elle Russia and has continued her rise to stardom by appearing in the 2019 horror film "47 Meters Down: Uncaged" and the 2021 crime thriller "Midnight in the Switchgrass." She's also the cohost of the "Unwaxed" podcast with her sister, Sophia.