Aniston, 45, was nominated to take the challenge by her fiancé Justin Theroux. The Leftovers star also helped Aniston complete the dare and slowly poured a bucket of iced water over her body as she shivered and whined.
The Friends star then nominated Charlie Downie and BFFs Courteney Cox and Chelsea Handler to take on the challenge.
Aniston joins a long list of celebrities who have completed the challenge with their significant others including Kelly Clarkson and Ben Affleck. Others have opted to put an interesting spin on the challenge -- like Matt Damon creating awareness about water conservation by completing the challenge with toilet water.