Mark Hamill has revealed President Zelensky compared Russia to the "evil Empire" in Star Wars.
The 71-year-old Star Wars actor is an ambassador to the United24 project, which donates drones to the Ukrainian army.
Back in September, the pair met and bonded over the film franchise - with the actor left in awe of Ukraine's inspirational leader following their meeting.
He called him "an amazing man" during an interview on Laura Kuenssberg's BBC Sunday morning politics.
Mark paid tribute to President Zelensky, admitting he had been "absolutely heroic" and "an amazing man" during the fight against Russia.
He said: "I was really fascinated with this man... because he's been absolutely heroic.
"And the Ukrainian people have been inspirational. He's an amazing man."
Remarkably, President Zelensky had referenced the Star Wars films when the pair met in September and spoke about how the film references good and evil.
The actor said the comparisons between invading a sovereign nation and an evil Empire were a clear tale of good versus evil.
He said: "He did reference the movies. And it's not hard to understand why.
"Star Wars was always a fairytale for children and fairytales are morality tales of good versus evil, where good is clearly defined, evil is clearly defined.
"It's not hard to extrapolate an evil Empire with Russia invading a sovereign nation. So it's not surprising, and that's probably what appealed to him about me."
The 71-year-old admitted the President didn't get to ask as many questions as he would have liked about Star Wars due to the limited time available.
Mark said: "We didn't dwell on it obviously - I mean, I was surprised he had the time in his schedule to even talk to me."
The actor spoke to President Zelensky for much longer than he anticipated and jokingly asked him if he needed to get back to work.
Hamill added with a chuckle: "When we spoke for so long I thought, don't you have to get back to work?"
The American actor revealed his involvement in the United24 project last month, saying he was "honoured" to be asked.
His role includes raising funds to support Ukrainian defenders, the Drone Army, a project set up by the Ukrainian government to procure unmanned drones to assist the war effort.
The drones will be used to monitor the 2,470km front line and provide an effective response to enemy attacks, the project's website said.
When asked by Laura Kuenssberg whether the platform would be used to supply lethal technology, Hamill answered: " Ukraine needs drones. They have some drones but not nearly as many as the Russians."
