Actor Ian McKellen (The Hobbit, X-Men) and designer Tom Ford are among the openly gay celebrities who have accepted the ice bucket challenge in support of the ALS Association.

The group's #IceBucketChallenge helps raise awareness and funds to help in the fight to find a cure for Amyotrophic Lateral Sclerosis (also known as Lou Gehrics Disease), a neurodegenerative disease.

McKellen accepted the challenge from George Takei and Luke Evans and and dared actors Laura Linney, Derek Jacobi and Anthony Hopkins to follow his lead.

McKellen completed the challenge on the studio lot in London where he is filming Mr. Holmes – which stars McKellen as Sherlock Holmes and Laura Linney as housekeeper Mrs. Munro. (The video is embedded on this page. Visit our video library for more videos.)

A seated Tom Ford, dressed in jeans and a denim shirt, was doused with a bucket of ice water by husband Richard Buckley.