Michael J Fox cracked jokes with Harrison Ford in a new video featuring guidance on how to support loved ones with Parkinson's disease.
In “So…Your Friend Has Parkinson’s,” the Shrinking stars exchange tips on how to be a good friend to someone living with the disease.
Fox, 65, received his diagnosis of young-onset Parkinson’s disease in 1991, a year after the release of Back To The Future Part III.
He founded the Michael J Fox Foundation for Parkinson’s Research in 2000, which has raised more than two billion dollars (£1.58 billion).