Actor Chad Lowe and his wife Kim Painter have announced the death of their 13-year-old daughter, Fiona Lowe.Chad Lowe is the younger brother of well-known actor Rob Lowe. The St. Elmo’s Fire star has three brothers among whom Chad is his full brother, while the other two – Micah Dyer and Justin Lowe are his half-brothers. View this post on Instagram Instagram PostFiona’s sudden death has shocked the entertainment industry. No official cause of death has been detailed beyond the family’s mental health reference in their statement. Sharing their grief in a statement to People magazine on September 29, the Lowe family said:“We are deeply heartbroken by the loss of our beloved Fiona. She was a loving young girl who was smart, creative and loved to dance.”Fiona was the middle daughter of Lowe and his wife Painter. Their eldest, Mabel Painter, is 17 and the youngest, Nixie Barbara, is 10.Continue reading for more details.More details on Chad Lowe’s siblings Chad Lowe and his brother Rob Lowe share the same parents, Barbara Lynn Hepler and Charles “Chuck” Davis Lowe. Barbara was a schoolteacher while Charles worked as a trial lawyer.The Lowe brothers were raised in Dayton, Ohio, after their family moved from Charlottesville, Virginia. Born in 1968, Chad Lowe is 58. He and Rob share an age difference of four years; Rob was born in March 1964, making him 62 years old.Their parents eventually divorced when Rob was four and Chad was only an infant. Both parents continued with their lives and remarried, welcoming additional children with their respective partners: Justin Lowe and Micah Dyer. View this post on Instagram Instagram PostJustin is the youngest of all Lowe brothers. He is their father's son from a later marriage after his divorce from Barbara. Dyer is the son of Barbara and her second husband, William Vaniman Dyer, whom she married in 1970. She married for the third time to Stephen N. “Steve” Wilson, a psychiatrist in Los Angeles. This was her final marriage.After making his debut with the sitcom A New Kind of Family at the age of 15, Chad Lowe’s elder brother, Rob, went on to appear in ABC Afterschool Specials and earned a Golden Globe nomination for the 1983 TV movie Thursday’s Child. He later became a teenage heartthrob in the 1980s, thanks to his breakout role in The Outsiders.He currently hosts the Fox game show The Floor and co-created and stars in the Netflix series Unstable with his son, John Owen.Chad Lowe followed in his elder sibling's footsteps in the entertainment industry. He is an actor and director, known for his role as Jesse McKenna on Life Goes On. His other acting credits include Pretty Little Liars, 24, Melrose Place, ER, and 9-1-1: Lone Star. Chad has directed episodes of multiple television series.Speaking to Fox News about Rob in 2022, Chad said:“We’ve had our battles like all siblings do. But he’s always been my best friend. And I think he would say the same of me. He’s the person that I turn to for almost everything in my life.”Rob and Chad’s younger brother, Micah, also stepped into the entertainment world. However, he had few acting credits in television shows in the 1990s. He later became a reality TV producer and has worked on shows like Project Runway, The Bachelor, and The Bachelorette.Little is known about Justin Lowe, who keeps a low profile compared to the rest of his family. He has a young son named Jackson, whom his grandfather, Chuck Lowe, introduced in a 2017 Instagram post.Chad, Rob and Micah's mother passed away in November 2003 in Summerland, California, at the age of 64. Her demise came after a lengthy battle with breast cancer. During this time, her sons acted as her primary caregivers.On the other hand, Chuck Lowe has been reported to be still alive and is 86-87 years old. He is a two-time non-Hodgkin’s lymphoma survivor.