Colin O’Donoghue shared his memory of the star, in view of his 602,000 followers.
He wrote: “Although I never met him, when I was an out of work actor with little money, I went to London for an audition and was asked to stay over for a call back the next day.
“I didn’t have accommodation, so one of the casting directors asked her father, who was away, if I could stay in his apartment.
“They very kindly said yes. I was genuinely touched that he would let a complete stranger stay in his home,” he added.
“It turned out to be Ian Holm’s apartment. What a gentleman! RIP.”