  Many stars harbour multi-planet systems. As these stars expand late in their
evolutions, the innermost planet may be engulfed, leading to a common envelope
(CE) event. Even if this is insufficient to eject the envelope, it may expand
the star further, causing additional CE events, with the last one unbinding
what remains of the envelope. This multi-planet CE scenario may have broad
implications for stellar and planetary evolution across a range of systems. We
develop a simplified version and show that it may be able to explain the
recently observed planet WD 1856 b.
