Luke was out to support his brother, Chris Hemsworth, who marks his eighth Marvel movie appearance as the Norse god, Thor, in the film.
"I've heard nothing but incredible things," Chris told ET about the film, which he hadn’t seen yet and felt "nervous" about watching for the first time.
"It's always a nerve-wracking experience, but this was -- we literally left it all on the field with this one, and it was a combination of about 22 films, 10 years of work, and so I think we all have a sense of pride," he added. "It's a bittersweet quality to it, because this is the last time this gathering of this group of people is going to be here together."
“It’s wild,” added Brie Larson, who plays Carol Danvers. “There’s nothing like it. There’s no movie like it.”