"Guess some things aren't so classified...It's now official," the actor captioned the image.
In the photo, Powell is wearing sunglasses and a jacket while standing next to the fighter jet inside a hangar.
"This movie is one of the reasons I became an actor. It's why I always go low after a high-five, always fall in love with my teachers, say things like 'clean 'em and fry 'em' on a daily basis, end volleyball games in oiled-up flexing, and why I can blame all my speeding tickets on Kenny Loggins," Powell continued, referencing various things from the original "Top Gun," released in 1986.
"In all seriousness, I just had my ten year anniversary since moving from Austin to Los Angeles to give acting a shot," he said.
"Victories are rare, dreams are mostly broken, so I am truly grateful for everyone in my life who's helped me beat the odds to get into this flight suit. This role is a dream come true."
Powell's Instagram confirmation comes after reports he was in talks to join the "Top Gun" movie sequel that will star a returning Tom Cruise.
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