CelebrityParents 'DWTS' Pro Lindsay Arnold Introduces Newborn Niece Quincy as Sister Brynley Welcomes First Baby "Everyone meet Quincy," proud aunt Lindsay Arnold wrote on Instagram, introducing her sister Brynley's first babyByAngela AndaloroAngela AndaloroTwitterAngela Andaloro is a Parents News Writer at PEOPLE. Angela has also written about entertainment and parenting at LittleThings, Mom.com, BuzzFeed, and more. In her spare time, she enjoys competing in fantasy sports leagues and watching too much reality TV.People Editorial GuidelinesandGlenn GarnerGlenn GarnerInstagramTwitterGlenn Garner is a Writer/Reporter who works heavily with PEOPLE's Movies and TV verticals. Since graduating from Northern Arizona University with a dual major in journalism and photography, he got his professional start at OUT Magazine, The Advocate and Teen Vogue, and he's since consistently kept his finger on the pulse of the LGBTQ community. His first book The Guncle Guide was released in 2020 and was featured on Katie Couric's list of 100 recommended books of the year.People Editorial GuidelinesPublished on August 5, 2022 10:30 PM Share Tweet Pin Email Photo: lindsarnold/InstagramLindsay Arnold is a proud new aunt... again! The Dancing with the Stars pro, 28, introduced her newborn niece Quincy to her 1 million Instagram followers on Friday, sharing a photo of herself holding the baby, her sister Brynley Arnold McGinnis and brother-in-law Donny McGinnis' first. "Everyone meet Quincy," Lindsay wrote in the caption. "Newest addition to the family and I am so lucky to be her auntie. We love you so much sweet girl! Congrats to mom and dad." 'DWTS' Pro Lindsay Arnold Shares Photo of First Time Meeting Little Sister Jensen's Baby: 'In Love' Brynley, 21, — who appears on the joint YouTube account The Arnold Sisters alongside Lindsay and sisters Jensen, 24, and Rylee, 17 — also shared some adorable photos of the infant. 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. "Hi my name's Quincy. 7 lbs 3 oz of absolute heaven," the new mom wrote. Lindsay previously shared the exciting news in a series of Instagram Stories, including the first family photo. "She's here and we never knew this kind of love existed. We are so happy and grateful," Brynley captioned the announcement post. In late June, Lindsay shared a sweet photo revealing that her So You Think You Can Dance finalist sister, Jensen, had welcomed her baby boy, Brooks Joshua Hill. "So in love with this perfect boy and so proud of his parents," the dancer wrote, tagging Jensen and husband Topher Hill and adding a red heart emoji. "HE'S HERE." Jensen's post announcing her son's birth revealed he was born at 10:21 p.m. on Wednesday, June 24. The newborn weighed 6 lbs and measured 19 inches at birth. Jensen and Topher tied the knot in December 2018. The high school sweethearts wed in a romantic ceremony two days after Christmas at Salt Lake City Temple in Utah. In a recent video on their YouTube channel, Lindsay confirmed that she and husband Samuel Lightner Cusick are trying to conceive their second child after they welcomed daughter Sage Jill in November 2020. RELATED VIDEO: Lindsay Arnold Shows Off Post-Baby Beach Body 2 Months After Welcoming Daughter Sage "I am currently trying to get pregnant," she shared during a life update. "So for everyone asking about that, it's happening. It kind of has been happening for a while, so send your good luck vibes to us."