When the interviewer asked Alden what he was told by Harrison prior to the film being shot, he is heard telling him: 'He said: "If anyone asks, tell them I told you everything you need to know, and that you're not allowed to say a word"'.
"This was a very unusual circumstance, and I made a decision to take it on frankly as a kind of a challenge", Howard said on the red carpet.
Ehrenreich clearly couldn't contain his excitement or shock when Ford crashed his interview - and hilariously told him to "Get out of my chair!".
"Get outta my chair!" See the moment below and check back to ETonline on Sunday for the interview.
According to the Hollywood Reporter, Ehrenreich met up with Ford for lunch after he was cast as the young Han Solo for advice on the role. Included in the set are posters for Han Solo, Chewbacca, Lando Calrissian, Tobias Beckett, and Qi'Ra, some of whom are sporting new outfits or striking different poses.More news: Madrid Open: Thiem stuns Nadal in quarter-finals
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On the star-studded premiere night, there was one obvious person missing: Harrison Ford.
Ford was accompanied by Solo director Ron Howard in his ambush, and there may be no better endorsement of the new film that the embrace between the two actors. And today I was doing an interview where they were talking about is there anything else you'd like to ask him?' Ehrenreich said in a press conference Saturday.
Critics have wondered whether Ehrenreich would be able to fill such big shoes, and how the actor could make the character "his own" while maintaining the integrity of the original character.
Ehrenreich, best known for the Coen brothers' comedy Hail, Caesar!
Ron Howard's Solo: A Star Wars Story stars Thandie Newton, Warwick Davis, Clint Howard, Alden Ehrenreich, Emilia Clarke, Paul Bettany, Woody Harrelson, Donald Glover, Phoebe Waller-Bridge, Joonas Suotamo, Richard Dixon, and Deepak Anand.