Chris Cohen had edged the visitors in front after 13 minutes, before Keith Southern finished off an Ian Evatt pull back to level the scores.
The Seasiders took the lead just before the hour mark, with Charlie Adam converting from the penalty spot.
Ian Holloway’s side were able to get the job done in the second leg at the City Ground, before clinching promotion with a victory over Cardiff City at Wembley.
Here’s the best photos from win against Forest at Bloomfield Road:
2. On this day in 2010
Keith Southern bags Blackpool's equaliser. Photo: Laurence Griffiths
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