Kaley Cuoco as Penny Hofstadter
Penny, played by Kaley Cuoco, was on The Big Bang Theory since the very beginning in 2007. An aspiring actress and waitress at the Cheesecake Factory, Penny quickly became Leonard's ongoing love interest. Kaley Cuco's salary per episode was only topped by that of Sofia Vergara.
Aarti Mann as Priya Koothrappali
Law student Priya, Raj's little sister, was introduced to The Big Bang Theory in the fourth season. She and Leonard attempted to keep their relationship under wraps, but they were soon found out, and Priya was sent back to India. Priya was played by Aarti Mann, who you may recognize from Scandal and Grey's Anatomy.