"I'm sad beyond words that Alan Thicke has passed away," Bure wrote alongside a photo of herself and Thicke on the set of Fuller House. "I've known you since I was 8 years old and so glad I had the pleasure of working with you again so recently on Fuller House."
Original Full House cast member and recurring Fuller House guest star Lori Loughlin also shared her thoughts on Twitter, writing, "I'm so sad to hear about the passing of Alan Thicke. RIP Alan."
Dave Coulier also shared a memory of his time with Thicke, tweeting a photo of himself and his fellow Canadian dressed up as Mounties for a comedy sketch. Coulier wrote, "RIP Alan Thicke. We skated side by side for years. Say hello to Gordie and The Rocket."
Thicke, who was best known for playing Jason Seaver on Growing Pains, suffered a heart attack while playing hockey with his 19-year-old son, Carter, on Tuesday. He was pronounced dead at Providence St. Joseph's Medical Center in Burbank, California. He was 69.