The Goonies star Martha Plimpton is paying a heartfelt tribute to her uncle, Robert Carradine. The Lizzie McGuire actor died at age 71 on Monday, February 23, following a battle with bipolar disorder, his family, including Plimpton's father, Keith Carradine, confirmed to Deadline. "My Uncle Bobby was the best one of all 8 brothers; blood, adopted, and step," Plimpton, 55, wrote via Instagram early Tuesday, February 24, alongside a photo of Robert. "Out of all of them, he was the absolute best.