Harry Styles' stepfather passed away this week, PEOPLE confirms.

"Harry’s stepfather, Robin Twist, sadly passed away this week after a long battle with cancer. The family asks for privacy at this time," a rep for the former One Direction singer told PEOPLE in a statement.

Twist, who has two other children from a previous relationship, reportedly helped raise the pop star since he was about seven years old. Twist and Styles' mother, Anne, wed in June 2013—they celebrated their fourth wedding anniversary on Instagram this month—where Styles served as the best man.

On Instagram, Styles' fellow 1D star Liam Payne acknowledged the loss, writing, "Harry my heart really goes out to you such an extremely sad day for us all who knew Robin. What a kind, gentle and beautiful soul, a true rarity to find in today's world. Sometimes they really do take the best of us far too soon."

Across Twitter, One Direction and Harry Styles fans are sending their condolences using the hashtag #RIPRobin. See some of their heartbroken posts, below:

Stars We Lost in 2017: