Melissa Ivy Rauch (; born June 23, 1980) is an American actress. She is well known for playing Bernadette Rostenkowski-Wolowitz on the CBS sitcom The Big Bang Theory from 2009 to 2019, for which she was nominated for the Critics' Choice Television Award for Best Supporting Actress in a Comedy Series in 2013. She starred in and executive produced three seasons of the revival of Night Court. Rauch's other acting credits include playing Tina on the American remake of Kath & Kim and Summer on the HBO fantasy horror drama True Blood. Rauch also starred in, co-wrote, and co-produced the 2015 sports comedy-drama film The Bronze and provided the voice of DC character Harley Quinn in the 2017 animated film Batman and Harley Quinn. Rauch also had supporting roles in I Love You, Man (2009), Ice Age: Collision Course and Flock of Dudes (both 2016), and Ode to Joy (2019). In 2019, Rauch played Meryl Streep's daughter in the feature film The Laundromat directed by Steven Soderbergh.