Tony Danza & Alyssa Milano Mourn Death of 'Who's the Boss?' Co-Star Katherine Helmond

Tony Danza and Alyssa Milano are remembering their late co-star Katherine Helmond.

Katherine‘s former Who’s the Boss co-stars shared sweet messages in remembrance of the late star after it was announced that she had passed away last month from complications from Alzheimer’s disease.

“Katherine Helmond has passed away. My beautiful, kind, funny, gracious, compassionate, rock. You were an instrumental part of my life,” Alyssa tweeted along with several photos of Katherine. “You taught me to hold my head above the marsh! You taught me to do anything for a laugh! What an example you were! Rest In Peace, Katherine.”

“I was in love with her. She was such an influence on me. From being a single guy with a hit show in Hollywood, though my marriage and having kids — she was with me,” Tony told Deadline. “No matter what problem I had, I could go to her. Very few people could match her.”

Fellow Who’s the Boss? cast mate Judith Light also shared a message about Katherine saying, ““Katherine Helmond was a remarkable human being and an extraordinary artist; generous, gracious, charming and profoundly funny. She taught me so much about life and inspired me indelibly by watching her work. Katherine was a gift to our business and to the world, and will be deeply missed.”