Actor Rory Culkin and his girlfriend Kate Arizmendi have welcomed their first child together. The couple shared the happy news over the weekend and introduced fans to their newborn daughter, Havoc Moon Alva Culkin. Arizmendi announced the birth through her Instagram Stories on Sunday. She posted a sweet photo of the baby girl sleeping peacefully with her tiny hands placed under her chin. She revealed that their daughter was born on Saturday. The proud new mother also shared an emotional message alongside the photo. She wrote that she and Rory were deeply in love with their daughter and added crying emojis to express her joy. Soon after, Arizmendi uploaded another picture showing the newborn looking alert shortly after birth. She joked about how awake and excited the baby already seemed just minutes after delivery. “15 mins after pushing her out and so alert and excited about life already,” Arizmendi wrote. She also playfully added, “Also hello girl baby Rory,” comparing the baby’s appearance to her father. The cinematographer later shared touching photos of Rory holding his daughter during skin-to-skin bonding time at the hospital. She described the actor as the “best papa,” giving fans a glimpse into the family’s emotional first moments together. Arizmendi also updated her earlier pregnancy announcement from January to reveal the baby’s full name: Havoc Moon Alva Culkin. She wrote that the couple already adored their daughter and joked that the newborn was already in charge of the family. The arrival of Havoc Moon marks a major new chapter for Rory and Arizmendi, who reportedly began dating in 2023. While the couple mostly keeps their relationship private, fans have followed their journey since Arizmendi first announced her pregnancy earlier this year. Rory Culkin is well known for his acting career and comes from one of Hollywood’s most famous acting families. He appeared in movies such as Signs and Scream 4. Over the years, he has built a strong reputation for taking on emotional and independent film roles. He is also the younger brother of actors Macaulay Culkin and Kieran Culkin. The Culkin family has remained active in Hollywood for decades. Macaulay shares two children with longtime partner Brenda Song, while Kieran and his wife Jazz Charton are parents to three children. That means baby Havoc Moon already has several cousins waiting to welcome her into the growing family. Before dating Arizmendi, Rory was married to camera assistant Sarah Scrivener. The former couple were together from 2018 until their separation in 2022. Fans quickly reacted online after the baby announcement. Many congratulated the couple and shared excitement over the unique name chosen for the newborn. Others praised the sweet family photos and the close bond already visible between Rory and his daughter. Arizmendi’s posts also gave followers a rare look into the couple’s private life. Both Rory and Arizmendi usually stay away from major public attention despite working in the entertainment industry. The baby news arrives during a busy time for the Culkin family, as both Rory and Kieran continue to receive praise for their acting projects. Fans of the famous siblings have continued to show strong interest in their personal and professional lives. For now, however, the focus is on the newest member of the Culkin family. With emotional messages, heartfelt photos, and loving reactions from fans, Havoc Moon Alva Culkin has already made a memorable first appearance online.