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

His family announced the US actor had died in his sleep.

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.

She reprised her role as Georgina Sparks in the second series of the recent Gossip Girl sequel