Mackenzie Crook has urged people to continue looking for his sister-in-law, Laurel Aldridge, who has been missing for three days.
The star of The Office, 51, has spoken of how the family are "really worried" for Ms Aldridge who has recently been receiving chemotherapy treatment.
It comes just days after Sussex Police also stated they were "concerned" about Laurel who was last seen in the Walberton area close to Arundel on Tuesday.