“During Kaley’s time on The Big Bang Theory, I enjoyed what she was able to bring to the role of Penny, but I just felt like she wasn’t given enough opportunities to showcase her range as an actor. So when The Flight Attendant came out, I was able to appreciate how incredible she is. Kaley is so good at comedy AND drama, and I’m glad she found a new show that allowed her to show her range, just like 8 Simple Rules did, especially after John Ritter’s death.”
—noradominick
Source: https://www.buzzfeed.com/noradominick/tv-movie-performances-realize-actor-was-amazing