The gorilla played the drum solo of Phil Collins' track 'In the Air Tonight'. The £6.2m campaign, by Fallon, broke during the live final of last summer's 'Big Brother'.
It was one of the most lauded ads, winning acclaim from the public as well as industry awards.
Next week's reprise will comprise mostly of the same footage and music, but with a slight twist, according to sources.
When the Gorilla ad first appeared, Cadbury said it was a one-off commercial that was to introduce a theme of a ‘moment of joy'.
Cadbury launched the follow-up ad, a midnight truck race to the soundtrack of Queen's ‘Don't Stop Me Now', in March this year.