Robert Carradine’s former co-stars are paying tribute to the actor following his death at the age of 71. Carradine was known for his roles in “Lizzie McGuire,” “Revenge of the Nerds” and “Escape from L.A.,” among others. Carradine’s manager and brother, Keith Carradine, confirm ed his death in a statement to NBC News. The statement said Carradine “succumbed to” bipolar disorder after navigating the condition for nearly 20 years. Hilary Duff, who played Carradine’s daughter on “Lizzie McGuire,” shared two photos with the actor and paid tribute to him in an Instagram post. “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. I’m deeply sad to learn Bobby was suffering. My heart aches for him , his family, and everyone who loved him. 💔,” she wrote. Jake Thomas, Carradine’s on-air son in “Lizzie McGuire,” also honored his former co-star in an Instagram tribute. “My heart hurts today. I was fortunate to know Bobby for most my life. And he was one of the coolest guys you could ever meet. Funny, pragmatic, sometimes cranky, always a little eccentric,” he wrote. Thomas called Carradine a member of his “family” and said he has “many fond memories being with him and his family” throughout his life. “Good moments, challenging moments, and lots of laughs between. 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,” he wrote. Thomas ended his post with the following message: “Rest easy, Bobby. Love you. — ‘Jaker.’” Carradine’s daughter, actor Ever Carradine, reflected on the loss of her father in an Instagram post. “My dad died today. My sweet, funny dad, who’s only 20 years older than I am, who never missed an opportunity to drive me to the airport or tell me how much he loved my homemade salad dressing, is gone. If you knew my dad, you know he’s the guy that’s always there. Invite him to dinner? He’s in. Kid’s Little League game in Simi Valley, just tell him what time,” she wrote. The “Handmaid’s Tale” star continued her tribute and described how Carradine was a single father when he was raising her in the ‘70s and ‘80s. “Whenever anyone asks me how I turned out so normal, I always tell them it’s because of my dad. I knew my dad loved me, I knew it deep in my bones, and I always knew he had my back. I think it’s partly because we basically grew up together. Twenty years age difference really isn’t that much, and while I never ever thought of him as a sibling, I did always think of him as my partner,” she wrote. The actor also underlined something “foundational” she learned from her father: “What a waste of time it is to hold a grudge.” “My dad was a lover, not a fighter. He was all heart, and in a world so full of conflict and division, I think we can all take a page out of his book today, open our hearts and feel and share the love,” she wrote. Actor Martha Plimpton, who is Keith Carradine’s daughter, also posted a tribute to her uncle. “My Uncle Bobby was the best one of all 8 brothers; blood, adopted, and step. Out of all of them, he was the absolute best,” she began her tribute. “He’s honestly, in fact, the best actor of all of them. And I think I know why. Because he was KIND. He had inherent KINDNESS in him. He was dear, and loving, and nonjudgmental. And he loved honestly. He made mistakes like anyone else, like any human. But he never lost his decency, or his heart. I love you, Bobby. You made my world happier. I will miss you enormously,” she wrote.  This story first appeared on TODAY.com. More from TODAY: Lily Collins Says She’s ‘Honored and Ecstatic’ After Being Cast as Audrey Hepburn in ‘Breakfast at Tiffany’s’ Movie Why Katherine Heigl ‘Debated’ Posting a Tribute to Eric Dane ‘For Days How Marvel Said ‘Sak Pase’ To Its First Haitian Superhero This story uses functionality that may not work in our app. Click here to open the story in your web browser. ...read more read less