Buffy The Vampire Slayer

David Boreanaz was the last major cast member to be cast for the first episode Welcome to the Hellmouth. Marcia Shulman, the casting director for Buffy at the time, was having problems finding the right guy. She auditioned hundreds of men but eventually a friends of hers saw David walking his dog and called her, telling her he’d found the perfect ‘Angel’. He eventually became David’s manager. When David stepped into Marcia’s office (the day before filming was due to start) she wrote “He is the Guy” in her notepad.

In the original script for Chosen, the conversation between Buffy and Angel was supposed to be longer, with Angel revealing to Buffy that he loved Cordelia and also that he had a son (which makes me wonder why Willow didn’t mention this to Buffy before). This was amended as it confused the storylines between the two shows.