Mark Hamill misses Carrie Fisher like a family member.

On Tuesday’s episode of “The Ellen DeGeneres Show”, the “Star Wars” actor shared his fondness for his late co-star, who passed away nearly one year ago at 60.

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“She’s like an irreplaceable member of the family,” Hamill said, “but the whole world feels that way.”

“I always think of her in the present tense, I don’t think of her in the past,” the actor continued, “because any time you were with her it was just fun.”

Of course, like any close family members, Hamill and Fisher did occasionally butt heads. “Carrie used to drive me crazy,” Hamill told DeGeneres. “We were more like real siblings than I really thought because we’d have huge fights.

“We’d have these big fights, and you wouldn’t see each other for months, or even years. And then you’d see each other again and remind yourself how much fun it was to be together. Because not only could she make me laugh, I could make her laugh.”

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Also on the show, DeGeneres brought out her resident 10-year-old “Star Wars” expert (and Calgary resident) Britton Walker to face off in a trivia game against Luke Skywalker himself.

The 66-year-old actor may have played the lead in the classic film series, but he was no match for Britton’s “Star Wars” knowledge.