Lucy Davis

Jenna Fischer's standing behind her British doppelganger ... showing support for her 'Office' inspiration Lucy Davis after the Brit revealed she's dying of incurable cancer. Jenna shared a kind comment on Lucy's cancer announcement post ... telling Lucy she loves her and saying it's important to…

Lucy Davis -- a British actress best known for her role in the OG 'Office' TV show -- has cancer ... and treatment can't save her. The star shared the sad news on Instagram ... posting a video of herself ringing a bell after completing cancer treatment -- though it turns out not to be the…