US actor Brendon has died in his sleep of ‘natural causes’.

The 48-year old was due to return as Buffy Summers in a new Hulu show but it was announced last week that it was no longer going ahead.

Trachtenberg’s death at 39 is not being treated as suspicious and police said a medical examiner will determine the cause of her death.

Trachtenberg played Georgina Sparks on the show.