Forming systems and methods for drape forming a composite charge are disclosed herein. The forming systems include a forming die having a forming surface and a collapsible support having a support surface. The collapsible support is configured to transition from an extended conformation to a collapsed conformation and is configured such that a gap width of a gap between the support surface and the forming surface decreases during the transition. The methods include positioning a composite charge, transitioning the collapsible support from an extended conformation to a collapsed conformation, decreasing the gap width of the gap as the collapsible support transitions from the extended conformation to the collapsed conformation, and deforming the composite charge from an initial conformation to a final conformation.