Celebrity Parents Ashlee Simpson Ross Says Son Ziggy, 11 Months, Is a 'Real Hit' with Her Other 2 Kids Ashlee Simpson Ross shares daughter Jagger, 6, and Ziggy, 11 months, with husband Evan Ross, plus son Bronx, 12, with ex-husband Pete Wentz By Georgia Slater Georgia Slater Twitter Georgia Slater is a writer/reporter on the Parents team at PEOPLE. She began at the brand in 2018 as an editorial intern and later returned as an intern on the Food team. Upon graduating from the University of Maryland in 2019, Georgia worked as an entertainment intern at USA Today before coming back to PEOPLE as a digital news writer. In April 2021, she began her role as a Parents writer/reporter. People Editorial Guidelines and Alex Cramer Published on October 7, 2021 02:05 PM Share Tweet Pin Email Photo: AFF-USA/Shutterstock Ashlee Simpson Ross's youngest son knows how to leave an impression on his siblings. The singer, 37, caught up with PEOPLE at Wednesday's premiere of L.O.L Surprise! in Hollywood, California, where she opened up about the relationship between her three children. Ashlee shares daughter Jagger Snow, 6, and Ziggy Blu, 1 this month, with husband Evan Ross, plus son Bronx Mowgli, 12, with ex-husband Pete Wentz. Speaking about her newest little one, Ashlee says, "He's got a real sweet personality so he's a real hit." "Jagger loves to entertain him," she adds of her daughter, who attended the movie premiere with her parents. "She likes to sing and dance for him." Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. Steve Granitz/WireImage Ashlee Simpson Ross Says She Has 'All the Feels' on Daughter Jagger's First Day of Kindergarten The star also dished on Ziggy's latest milestones, sharing that he is "standing on his own" and she thinks that "walking is coming" as he turns 1 later this month. Ashlee can't believe how fast her kids are growing up, made clear in a sentimental post she recently shared in honor of Jagger's first day of kindergarten. In the sweet photo, Jagger stands in her school uniform while holding up an "all about me" sign reading her age, grade, teacher's name and the date. The chalkboard also featured some of Jagger's career aspirations, including her dreams of becoming an "artist, movie star and [to] walk on a runway." "All the feels today ❤️😭," the proud mom captioned the picture on her Instagram Story.