Jenna Fischer revealed that Christina Applegate was one of the first people she called after being diagnosed with an aggressive form of cancer.

Jenna Fischer said her breast cancer diagnosis came as a shock, especially after a routine mammogram showed no immediate cause for concern

Jenna Fischer is opening up more about her battle with breast cancer. On Monday, the Office star sat down with Today's Hoda Kotb and revealed that Christina Applegate was one of the first people she reached out to for support after she was diagnosed.