Renowned French news outlet 'Canal +' reports that Tuchel has signed a two-year deal in the French capital, with the option for a further year.
It is thought that the deal will be announced at the end of the season, allowing Emery to continue to lead the side until the end of campaign.
Whilst Ligue 1 is already in the bag, the French giants still have the French Cup to play for and will face third division 'Les Herbiers' in the final as they look to complete a domestic treble.
The aformentioned source claims that Tuchel will be given carte blanche to mould his squad upon taking the hotseat.
Several other sides, including Bayern Munich and Arsenal have been linked with Tuchel in recent week, but it appears his future is already decided.