Which two actresses play the main roles in the American sitcom TV series "What I Like About You"?

"What I Like About You" is an American sitcom television series set mainly in New York City, following the lives of two sisters: responsible older sister Val (Jennie Garth) and her vivacious teenaged sister Holly (Amanda Bynes). The series ran on The WB from September 20, 2002 to March 24, 2006, with a total of 86 episodes produced. With the exception of a brief period early in the second season, "What I Like About You" was a headline on The WB's Friday Night Comedy Lineup.