(CNN) Porsche and Mercedes-Benz will be competing in Formula E next year as the all-electric series revealed its new bumper calendar for the 2019/20 season.

The two motorsport titans will come face to face with rivals BMW and Audi for the first time in what will be the busiest season in Formula E history.

The new additions will boost the number of cars and drivers on the grid to 24, which will now include more manufacturers than any other racing category.

JUST WATCHED Mercedes looks ahead to joining Formula E Replay More Videos ... MUST WATCH Mercedes looks ahead to joining Formula E 02:27

Since its inception five years ago, Formula E has been at the forefront of promoting green travel, and some of the world's most prestigious manufacturers have joined the rapidly growing series.

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