Kate Beckinsale is mourning the loss of her 'dearest friend,' her mother British actor Judy Loe. Loe died this week at age 78 from cancer.

Best known for her work on such TV shows as 'General Hospital,' 'Inspector Morse,' 'Casualty' and 'Holby City,' Loe died Tuesday following a Stage 4 cancer diagnosis.

Kate Beckinsale announced the death of her mother, Judy Loe, on Thursday, July 17. She said in an emotional Instagram post that Loe died "in my arms after immeasurable suffering."