The all-new BMW 3 Series will be officially unveiled tomorrow at the Paris Auto Show, but thanks to leaked images taken from BMW's online configurator we've managed to get a revealing look at BMW's sports sedan undisguised before its world debut. Images posted by BimmerPost show the new 3 Series in all its glory from every possible angle showing a range of models including the range-topping M340i, the M Sport Package, the Sport Line, and a variety of interior configurations. As expected, it essentially looks like a shrunken version of the new 5 Series, but that's no bad thing.

The G20 3 Series looks more aggressive than its predecessor, sporting a larger grille, redesigned headlights available either as LEDs or laser lights and a new double crease down the side. At the back are slim taillights and a subtle boot-lid spoiler. Four exterior colors are shown in the configurator images: Dravit Grey, Tansanit Blue II, Citrin Black II and Vermont Bronze. Along with the Portimao Blue.

We also get a look at the interior, which includes a 12.3-inch digital instrument cluster, a 10.25-inch central touchscreen display, new sports seats, new climate controls, and new steering wheels. From the images, it's a significant improvement over the outgoing model.

Under the skin, the new 3 Series rides on BMW's new CLAR architecture, which also underpins the 5 Series and X3 SUV. In terms of powertrains, the new 3 Series is expected to use a 3.0-liter turbocharged inline six-cylinder delivering around 360 hp and 370 lb-ft of torque paired with an eight-speed automatic transmission. Full details will be revealed tomorrow at the Paris Auto Show, so stay tuned.