Djebbour has joined the Reds for an undisclosed fee, believed to be in the region of £1.2million, and has put pen to paper on a two-and-a-half year contract.
His arrival at the City Ground ends manager Billy Davies' wait to sign a striker having had offers for a handful of other targets rejected both in the summer and this month.
Djebbour himself came close to joining Forest in July but the deal collapsed at the 11th hour when the player refused to undergo a full medical.
The 29-year-old revealed via Twitter on Friday that he was ''very happy to come to England for a new challenge with Nottingham Forest'' and the Sky Bet Championship confirmed his signing on Wednesday.
- Sports & Recreation
- Billy Davies