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We present the discovery of stellar tidal tails around the Large and theSmall Magellanic Clouds in the Gaia DR1 data. In between the Clouds, theirtidal arms are stretched towards each other to form an almost continuousstellar bridge. Our analysis relies on the exquisite quality of the Gaia'sphotometric catalogue to build detailed star-count maps of the Clouds. Wedemonstrate that the Gaia DR1 data can be used to detect variable stars acrossthe whole sky, and in particular, RR Lyrae stars in and around the LMC and theSMC. Additionally, we use a combination of Gaia and Gale to follow thedistribution of Young Main Sequence stars in the Magellanic System. Viewed byGaia, the Clouds show unmistakable signs of interaction. Around the LMC, clumpsof RR Lyrae are observable as far as ~20 degrees, in agreement with the mostrecent map of Mira-like stars reported in Deason et al (2016). The SMC's outerstellar density contours show a characteristic S-shape, symptomatic of theon-set of tidal stripping. Beyond several degrees from the center of the dwarf,the Gaia RR Lyrae stars trace the Cloud's trailing arm, extending towards theLMC. This stellar tidal tail mapped with RR Lyrae is not aligned with thegaseous Magellanic Bridge, and is shifted by some ~5 degrees from the YoungMain Sequence bridge. We use the offset between the bridges to put constraintson the density of the hot gaseous corona of the Milky Way.

Clouds, Streams and Bridges. Redrawing the blueprint of the Magellanic System with Gaia DR1