Rachel Melvin (born February 9, 1985) is an American actress best known for her roles as Chelsea Brady on Days of Our Lives and as Penny in Dumb and Dumber To.

For Disney, she played Syd in the Good Luck Charlie episode "Bad Luck Teddy", she played a attractive young girl that works at a Barber Shop.  In 8 Simple Rules, she played a character known as the "Cute Girl" in the episode "Freaky Friday".  She played "Nicole Hixton" in the ABC TV series, Castle.