Katherine Marie Helmond (GalvestonTexasJuly 5, 1928) is an American actress.

Helmond became known as Mona Robinson in the sitcom who's the Boss?. Before that, she was seen as Jessica Tate in the series Soap. They also played many film roles, including in Alfred Hitchcock's last film Family Plot and further including The HindenburgTime BanditsBrazil and Overboard.

Also she played the recurring guest role of Lois in the comedy series Everybody Loves Raymond. Also she spoke the voice of Lizzie in for the animated film Cars.