Jenna Fischer, who played Pam Beesly in the US Office, has revealed she was diagnosed with an “aggressive” breast cancer in December last year.

The 50-year-old shared a photo of herself in her “patchy pixie” haircut to mark breast cancer awareness month.

“After completing surgery, chemotherapy and radiation I am now cancer free,” she wrote on Instagram.

Fischer said problems were flagged during a routine mammogram, where inconclusive results due to dense tissue led her doctor to…