The ongoing Juno and recently concluded Cassini missions have provided crucial new datasets that changed our perspective on the interiors, atmospheres and magnetospheres of Jupiter and Saturn, and challenged current theories on the formation and evolution of giant planets. This session welcomes contributions on a wide range of topics: gravity and magnetic field analysis and interpretation, giant planet magnetospheres, aurorae, radiation environments, atmospheric dynamics, and satellite interactions. The session also welcomes remote observations acquired in support of the Juno and Cassini missions, and discussions of formation scenarios and evolutionary pathways of planetary bodies in our Solar System and beyond.