If you grew up in the 90s, you will definitely have heard of Buffy the Vampire Slayer.

I embarrassingly enough, actually attended Buffy conventions in Dublin as a teenager, where droves of avid fans would sit for five or six hours and watch the upcoming season.

The man responsible for the show, Joss Whedon is a writer, director, producer, composer, editor and now an actor.

He is most famous for this cult favourite which chronicled the ass kicking adventures of girl power icon Buffy from Sunnydale.

Buffy became a smash hit musical and before that it was a huge success as a TV show, netting four million viewers per episode when it ran from 1997 to 2003.

The actors involved became household names and the show is still available to be streamed on Netflix.

Whedon then went on to create Angel, a series based on Buffy’s dangerously gorgeous vampire lover.

Amy Pascale has written a biography of the ‘Geek King of the Universe’ which gives an account of making the ground-breaking show Buffy but also looks at Whedon’s contribution to other programmes and cinema like Toy Story and the blockbuster The Avengers.

Avengers star Robert Downey Jr hailed Whedon as "so smart and so good,"

Whedon also grabbed headlines when he tried his hand at acting, his performance as Hamlet was described as "uniformly brilliant" by Anthony Stewart Head after a staged Shakespeare reading at Whedon's house.

You might be surprised to know that Whedon was heavily involved in the creation of Pixar's iconic film "Toy Story".

The film was based on an original Pixar story "Tin Toy," which was an early rough draft.

In her new book, Amy Pascale describes this first film as unwatchable.

“Woody the cowboy and Buzz Light Year the astronaut were sarcastic and unlikeable which is not exactly ideal heroes for a children’s movie.

“Woody was a bitter toy who berated and insulted all the other toys and was bound and determined to destroy Buzz.”

It wasn’t until Whedon came on board that the script was shaped into the story we all know and love.

He worked with Pixar for over six months on the project, so it wasn't "to infinity and beyond” but it was a much longer gig than he anticipated.

Whedon had originally planned for it to last around three weeks.

Amy Pascale, the author of ‘Geek King of the Universe’ joined Sean on the show: