Katie Logan

Katie Logan is a fictional character from ''The Bold and the Beautiful'', an American soap opera on the CBS network. Portrayed by Nancy Sloan for much of her duration on the series, she is currently portrayed by Daytime Emmy Award winning actress, Heather Tom. She is the younger sister of Storm, Brooke and Donna Logan. The character is known for her relationship with Bill Spencer Jr. (Don Diamont). Provided by Wikipedia