|Full Name||Mrs. Thornhill|
London, United Kingdom|
Two unnamed children
Trevor Philips (friend, 2013)
|Voiced by||Patricia Kilgarriff|
|image = Mrs.Thornhill-GTAV.jpg
|game_1 = GTA V
|name = Mrs. Thornhill
|status = Alive
|gender = F
|home = London, [[United Kingdom]]
Mrs. Thornhill, while living in the United Kingdom, had married and had two children before joining Nigel in taking a holiday to Los Santos. The two, obsessed with Vinewood celebrities, stalk celebrities and go through the garbage in order to acquire objects for her collection of celebrity owned items. The two, prior to 2013, had stalked Al Di Napoli with Di Napoli taking out a restraining order against them. Mrs. Thornhill and Nigel have presumably been in Los Santos for a lengthy period of time as Nigel tells their newly found acquiantance Trevor Philips (believing him to be Jock Cranley) that she has rarely seen her family since starting their hunt for celebrity items.
In 2013 they meet Trevor Philips and mistake him for former actor Jock Cranley. She takes a photo of Trevor choking Nigel in a scene similar to one of Jock's film roles and then ask him to steal certain items from celebrities. Trevor then steals Willie's golden tooth assaulting him in Tequi-La-La, steals the dog collar of Kerry McIntosh's dog, steals Tyler Dixon's swimming trunks and kills Mark Fostenburg to steal his golf club. Trevor delivers the stolen items to Mrs. Thornhill and Nigel who then spot Di Napoli, their favourite action film star. Trevor, at their request, then chases DI Napoli through the city until he crashes having driven through the Pillbox Hill Medical Center's window. Trevor kidnaps Di Napoli and drives the three to an abandoned garage in Strawberry for a "private interview".
A few days later, with Di Napoli refusing to eat, Mrs. Thornhill and Nigel call Trevor to take care of Di Napoli fearing he will starve. The trio discuss whether to let him go in the countryside, allowing for a quick getaway before he could alert the authorities or whether to kill him. Mrs. Thornhill and Nigel, who are not good at saying goodbye, leave the task to Trevor who can either allow Di Napoli to escape or kill him by driving Nigel's car by leaving it on the train tracks before it is destroyed in a crash. Nigel and Mrs. Thornhill are not arrested and presumably continue to stalk celebrities.