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The cast of Lizzie McGuire shared tributes to actor Robert Carradine after his tragic death at the age of 71.

Carradine’s family announced his death in a February 23 statement to Deadline. Carradine’s cause of death was suicide.

“It is with profound sadness that we must share that our beloved father, grandfather, uncle, and brother Robert Carradine has passed away. In a world that can feel so dark, Bobby was always a beacon of light to everyone around him,” the statement read. “We are bereft at the loss of this beautiful soul and want to acknowledge Bobby’s valiant struggle against his nearly two-decade battle with Bipolar Disorder. We hope his journey can shine a light and encourage addressing the stigma that attaches to mental illness. At this time we ask for the privacy to grieve this unfathomable loss. With gratitude for your understanding and compassion.”

Carradine’s older brother, Kevin, emphasized his brother’s long mental health battle. “We want people to know it, and there is no shame in it,” he said. “It is an illness that got the best of him, and I want to celebrate him for his struggle with it, and celebrate his beautiful soul. He was profoundly gifted, and we will miss him every day. We will take solace in how funny he could be, how wise and utterly accepting and tolerant he was. That’s who my baby brother was.”

The Revenge of the Nerds had a daughter, actress Ever Carradine, with Susan Snyder in 1974 and later had two more children, Marika and Ian, with ex-wife Edie Mani.

Hilary Duff took to Instagram to share a tribute to Carradine, who played her on-screen dad in Lizzie McGuire from 2001 until 2004. “This one hurts. It’s really hard to face this reality about an old friend. There was so much warmth in the McGuire family and I always felt so cared for by my on-screen parents. I’ll be forever grateful for that,” she said. “I’m deeply sad to learn Bobby was suffering. My heart aches for him, his family, and everyone who loved him.”

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“My heart hurts today,” wrote Jake Thomas, who played Lizzie’s brother Matt. “I was fortunate to know Bobby for most of my life. And he was one of the coolest guys you could ever meet. Funny, pragmatic, sometimes cranky, always a little eccentric. He was a talented actor, musician, and director. But more than anything, he was family. I have many fond memories being with him and his family throughout my life. Good moments, challenging moments, and lots of laughs between.”

Thomas continued, “I looked up to him growing up. And later in life, I came to realize he thought I was pretty neat, too. So I guess I was doing something right in his eyes. My heart is with Marika and Ian. Rest easy, Bobby. Love you. – ‘Jaker’”

Actress Hallie Todd, who played Lizzie’s mom and Carradine’s onscreen wife, also shared her grief on Instagram.

“My heart is broken. I’m going to miss my sweet buddy so much. He was a generous and loyal friend. He was brave, strong, kind and had a wicked sense of humor. He was a champion for the people he loved and always wanted the best for us,” she wrote. “He was a wonderful actor, a brilliant guitar player, and the most incredible and devoted father. Over the last 25 years, our families grew extremely close, celebrating birthdays, graduations, Halloweens and Thanksgivings together. My friendship with Bobby and his family is probably my most treasured personal gift from working on Lizzie McGuire. He was my family on screen and off. My heart, love, strength and prayers are with his family and loved ones as they navigate through this enormous loss.”