The Big Bang Theory was an instant TV hit when it burst onto screens in 2007, though at the time, Melissa Rauch was resigned to watching the lives of Sheldon, Leonard and Penny unfolding on her TV set, unaware that she was soon to become one of the most loveable characters on the show.
Rauch first appeared as the sweet Dr. Bernadette Rostenkowski in a recurring role throughout Season 3, but was quickly moved up to become a series regular as her unlikely relationship with hopeless womaniser Howard Wolowitz flourished.