Jennifer Love Hewitt as Robin
Hewitt was supposed to play Robin, but she eventually turned down her role to star as a woman who could see and talk to ghosts in the series “Ghost Whisperer.” The two shows actually premiered the same year and even aired on the same network. Little did she know that “Ghost Whisperer” would be canceled after just five seasons. On the other hand, “How I Met Your Mother” lasted four more years.