Seth Green was in the 1990 Christian Slater movie, Pump up the Volume alongside Juliet Landau, who played Drusilla.

Seth Green played guitarist and werewolf Oz. Like many of his Buffy co-stars, Seth started acting as a child in commercials. Seth then appeared in a few movies including playing the boyfriend of Alyson Hannigan’s character in My Stepmother is an Alien. Jodie Foster’s production company, Egg Pictures, is named …

Seth Green and Sarah Michelle Gellar were cast together in a commercial when they were very young by Marcia Shulman, who later became the casting director for Buffy.
After Buffy had finished, Seth and Sarah also starred in Scooby-Doo 2: Monsters Unleashed together.

Doug Petrie wrote the screenplay for the movie Harriet the Spy which starred Michelle Trachtenberg.

In Help, Cassie references the kids TV show The Adventures of Pete & Pete when she says, “Or a sexy hula girl who wiggles when you flex?”. Michelle Trachtenberg was a regular character on The Adventures of Pete & Pete, called Nona Mecklenbergon.

Joss Whedon has said that Michelle Trachtenberg (Dawn) actually visited the set on the day the “Be back before dawn” sequence was filmed in Restless. This scene signified the coming of the character Dawn. Michelle was only there as a friend of Sarah Michelle Gellar’s, and had not yet been …

David Fury has mentioned that Dawn was originally supposed to be much younger than she ended up - about 12 years old. When Michelle Trachtenberg came to read for the role they decided she was perfect, and made the character older so they could cast her. This explains why Dawn …

Michelle played Dawn Summers. Michelle started acting in commercials when she was just three years old. She grew up in New York but moved to Los Angeles. She appeared for two years on the soap All My Children as Lily Montgomery, alongside Sarah Michelle Gellar. Michelle starred in the movies …

James Marsters was added to the opening credit montage from the episode The Initiative.

Some fans claim that in the end scene of When She Was Bad, when Buffy joins Xander and Willow in the classroom, the guy sitting in front of Buffy is James Marsters, who plays Spike (James had not yet joined the cast of the show). It’s definitely not him though …

James Marsters had to bleach his hair to play Spike. James swears that putting packets of Sweet and Low in the bleach lessens the stinging on his scalp when he has to dye his hair. His hair is naturally very curly and the bleach also acts as a straightener. He …

James was a member of the band Ghost of the Robot, in which he sang and played guitar. The band broke up in 2004.

Christian Kane, who played Wolfram and Hart lawyer Lindsey McDonald on Angel, originally auditioned for the role of Riley Finn. He told EW.com, “I auditioned for Buffy, for the role that Marc Blucas has”.

There’s a rumour that the character of Whistler, seen in Becoming (Part 1), was originally intended to be in the spin-off show Angel, but Max Perlich (the actor who played Whistler in Becoming) wasn’t able to commit to the series so the character of Doyle was created.

Whistler had a great line in the script of Becoming (Part 1) which never made it to the show: “There are three kinds of people that no one understands: geniuses, madmen and guys that mumble.”