Here's Why Cassie and Lexi's Mom Looks So Familiar

Alanna Ubach plays Serena in 2001's Reese Witherspoon-led film "Legally Blonde." As one of Elle Woods's (Witherspoon) sorority sisters, Serena always has her friend's backs. She not only cheers Elle on as she tries to get into law school but also shows up for her big trial at the end of the movie.