Fans can't believe Gillian Anderson's age as she celebrates her birthday in London

Gillian Anderson Recalls Horror Movie That Terrified Her After Some ‘Strong Pot' (Exclusive)

'Teenage Sex and Death at Camp Miasma,' Starring Hannah Einbinder and Gillian Anderson, Examines Slasher Movies and Sexual Awakenings

Kristen Stewart Steps Out to Support Hannah Einbinder & Gillian Anderson at ‘Teenage Sex and Death at Camp Miasma’ Premiere