Entertainment Music Country Music Whitney Port’s Son Sang The Hills Theme Song During His Kindergarten Graduation The former MTV star shared the unexpected song choice her son and his graduating kindergarten class sang "Unwritten" at their sendoff ceremony By Charna Flam Charna Flam Charna Flam is a writer-reporter at PEOPLE. She has been working at PEOPLE since 2023. Her work has previously appeared on Variety, The New York Post, and The Wrap. People Editorial Guidelines Updated on June 5, 2024 12:22AM EDT Close Whitney Port and Sonny Sanford Rosenman. Photo: whitneyeveport/Instagram Whitney Port just had a throwback moment at her son's latest milestone achievement! The Hills alum shared a new TikTok celebrating her son Sonny Sanford's kindergarten graduation on Tuesday, June 4. The graduating class surprised Port, 39, with their unexpected song choice. Port shares her six-year-old son with husband Tim Rosenman. During the students’ ceremony, they serenaded the crowd with their rendition of Natasha Bedingfield’s “Unwritten,” which served as The Hills' theme song. In the short clip, the children sing the song’s bridge: “Staring at the blank page before you/ Open up the dirty window/ Let the sun illuminate the words that you could not find.” The TV personality wrote in a text on the video, "The song choice at my son's kindergarten graduation..." which was accompanied by a quizzical look. Whitney Port at son's kindergarten graduation. tiktok Whitney Port Undergoes IVF Again as She 'Falls More in Love' with Being a Mom to Son, 6 (Exclusive) Port simply captioned the video, “Full circle moment? #thehills.” Several fans of the series shared their excitement in Port’s comment section. One wrote, “That music teacher is a millennial for sure😂 he knows.” Meanwhile, another added: “I love this?? But curious if someone caught wind whose mama was in the audience? LOL❤️🤣.” A third user also speculated that the school faculty may have chosen the song on purpose, knowing Port would be present. “There’s no way that was a coincidence 😂 that’s so cool," the user wrote, while another commented, “Wait. They did that FOR you!!!! Come on now. ❤️.” The PEOPLE Puzzler crossword is here! How quickly can you solve it? Play now! 'The Hills' Cast: Where Are They Now? 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. The Hills originally premiered on MTV in 2006 as a spinoff of Laguna Beach centered on Lauren Conrad. "Unwritten" was released in November 2004. Port and Conrad starred alongside Heidi (Montag) Pratt and Audrina Patridge as the show's original main cast. When Conrad, now 38, left during season 5, her former Laguna Beach costar Kristin Cavallari took over as the series lead through its sixth and final season. Whitney Port and Tim Rosenman with their son Sonny Sanford in Chicago. Whitney Port Instagram Almost a decade after The Hills wrapped in 2010, MTV brought it back in 2019 as The Hills: New Beginnings. The sequel show featured several returning stars, like Brody Jenner and Justin "Bobby" Brescia, alongside newcomers including Mischa Barton and Brandon Thomas Lee.