The Captain Marvel actress secretly filmed a video at the opening of Super Nintendo World in Orlando. Rosalina voice actress Brie Larson is apparently pretty good at keeping secrets. The Marvel Cinematic Universe star filmed a video in May at the grand opening of Super Nintendo World in Orlando about getting to play the cosmic princess in The Super Mario Galaxy Movie. On Instagram, Larson shared the video--along with a few pictures--showing her excitement about becoming Rosalina. "I'm hiding inside a warp pipe right now. I'm going to be in the next Super Mario movie," the actress said with a smile. "It's called Super Mario Galaxy, and I play Rosalina. It is an absolute dream come true." A post shared by Brie Larson (@brielarson) Nintendo and Universal announced Larson's casting during a Nintendo Direct earlier this week. The presentation featured the first trailer for The Super Mario Galaxy Movie, which also sees the introduction of Uncut Gems co-director Benny Safdie as the voice of Bowser Jr. The trailer offers a ton of Easter eggs for Mario fans. Even though she's in the movie, Larson is one of those fans, too. The Captain Marvel actress has talked in the past about throwing a boyfriend out of her house after he complained that she was taking the final level in Super Mario Galaxy too seriously. Larson has also been part of an ad campaign for the Switch in the past. For more, check out everything we know about The Super Mario Galaxy Movie. The sequel is set to premiere in theaters on April 3. Latest in Super Mario Galaxy New Super Mario Galaxy Movie Trailer Blasts Off For A Cosmic Adventure All The Easter Eggs And References You May Have Missed In The Super Mario Galaxy Movie Trailer Brie Larson Once Took Drastic Action When Told She Took Super Mario Galaxy Too Seriously