Frozen star Josh Gad has paid tribute to Sir Ian Holm as “the beating heart” of the Lord Of The Rings trilogy following his death at the age of 88.

Last month, Gad hosted a reunion for the cast of Peter Jackson’s much-loved films as part of his Reunited Apart YouTube series, attended by stars including Sir Ian McKellen, Orlando Bloom and Elijah Wood.

Despite being unable to attend, Sir Ian, who played the hobbit Bilbo Baggins, sent a letter to his castmates.

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A few weeks ago, I got to read a letter from this beautiful man to his co-stars and partners from #TheLordOfTheRings on #ReunitedApart . To think that a mere 30 days later he is gone is heartbreaking beyond words. Ian Holm was the beating heart of that incredible trilogy. Bilbo’s journey with the ring would set up everything that would transpire and with a lesser actor, it would not have had nearly the same effect. With a legacy that includes “Brazil,” “Time Bandits,” “The Madness of King George,” “Alien,” “Chariots of Fire,” “Ratatouille,” and so many more, his is a legacy that very much resembles that of Bilbo’s… a legacy of so many life-changing adventures, thrills and journeys, all of which in turn made us all the more lucky and blessed to be a part of it. Peace to you on your greatest adventure yet Sir Ian. Here is that letter he sent to his LOTR Team: “Dearest friends from the ring l am sorry not to see you in person l miss you all and hope your adventures are taking you to many places l am in lockdown in my Hobbitt home or Holm with all my love Ian Holm”

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Gad wrote on Instagram: “A few weeks ago, I got to read a letter from this beautiful man to his co-stars and partners from #TheLordOfTheRings on #ReunitedApart.

“To think that a mere 30 days later he is gone is heartbreaking beyond words.”

He added: “Bilbo’s journey with the ring would set up everything that would transpire and with a lesser actor, it would not have had nearly the same effect.

“With a legacy that includes Brazil, Time Bandits, The Madness of King George, Alien, Chariots of Fire, Ratatouille, and so many more.

“His is a legacy that very much resembles that of Bilbo’s…

Frozen 2 European Premiere – London
Josh Gad (Matt Crossick/PA)

“A legacy of so many life-changing adventures, thrills and journeys, all of which in turn made us all the more lucky and blessed to be a part of it.

“Peace to you on your greatest adventure yet Sir Ian.”

The artistic director of the Royal Shakespeare Company, Gregory Doran, described Sir Ian as “one of the RSC greats”.

The acclaimed actor joined the Stratford-based theatre company in 1958.

Tolkien UK premiere London
(Isabel Infantes/PA)

Mr Doran added: “Ian perfectly expressed the cross-fertilisation between classics and new writing that Peter Hall forged in the early days of the RSC.

“He married the technique of a classical Shakespeare actor and the intense naturalism and economy of style of a modern tradition…

“Ian was entirely original. Entirely a one-off.

“He had a simmering cool, a compressed volcanic sense of ferocity, of danger, a pressure cooker actor, a rare and magnificent talent.

“There’s a great spirit gone.”

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Mia Farrow was among those paying tribute to the actor (Andrew Parsons/PA)

Actress Mia Farrow recalled her experience of working with Sir Ian during and RSC production of The Iceman Cometh when he developed stage fright.

“Awful news that Ian Holm has died,” she said, adding: “He was among the giants of the theatre.

“We met while working at the RSC where, mid-performance of Iceman Cometh, terror seized him and he left the stage – for 14 years.”

She added that he was an “unfailingly brilliant” actor.

Victoria & Abdul Premiere – London
Eddie Izzard also paid tribute to Sir Ian (Matt Crossick/PA)

Comedian Eddie Izzard described Sir Ian as a “great”.

He added: “Wonderful actor and it’s so sad to see him go. Farewell, you did great work Sir.”

The National Theatre paid tribute to Sir Ian in a post on their official Twitter page.

The Hobbit: An Unexpected Journey premiere – London
(Ian West/PA)

It said: “We’re very sad to hear that Ian Holm has passed away.

“He was an extraordinary actor and we have wonderful memories of his performance at the National Theatre as King Lear.”

Bafta said in a statement that they are “very sorry to hear of the death of Ian Holm”, while comedian Robert Webb described him as a “splendid actor”.

Actor Reece Shearsmith said that Sir Ian had “a lifetime of incredible performances”.