"Avatar" is maintaining its popularity in the move from box office to home video, with sales of 6.7 million DVDs and Blu-ray disks in the first four days.

Twentieth Century Fox announced Sunday that James Cameron's sci-fi epic has sold 2.7 million Blu-rays and 4 million DVDs since April 22.

The combined sales brought in $130 million.

The studio says "Avatar" has become the fastest-selling Blu-ray of all time.

No announcement has been made regarding a 3-D DVD release, but a Fox spokesman said one can be expected in the future.