While the original tweet has since been taken down, the single image shows the updated hot hatch in Peugeot's signature two-tone paint finish, though you'd be hard-pressed to noticed any real changes.
It appears the 308 GTi gets a black version of the more upright front grille and prominent intakes in the bumper like the regular updated 308 range, along with a revised bonnet.
Above: 2018 Peugeot 308
While there's no view of the rear, it's likely the 308 GTi will get similar LED tail-lights and a new rear bumper treatment like the core line-up.
Expect the 1.6-litre turbocharged four-cylinder petrol engine to soldier on under the bonnet, though with a little more power than the current 250hp (186kW) and 270hp (201kW) offerings.
Also likely to carry over is the six-speed manual transmission and front-wheel drive set-up, with the more powerful model getting a Torsen limited-slip front differential.
Above: Peugeot 308 GTi 270
It's unknown whether Peugeot still plans to create a production version of the 308 R HYbrid concept that debuted at the 2015 Shanghai motor show, which managed maximum system outputs of 373kW and 730Nm from its 201kW 1.6-litre turbo petrol engine and 85kW electric motors on each axle, while also claiming to use 3.0L/100km on the combined cycle.
Stay tuned to CarAdvice for more Peugeot 308 GTi updates in the coming months.