Sean O'Donnell in Mamaboy (2017)

Sean O'Donnell stars in the high school comedy Mamaboy. The movie centers around his character, Kelly Hankins, who enlists his crazy scientist uncle to transfer his pregnant girlfriend's baby into his body to help hide it from their families and friends until after graduation. Sean gets a shirtless scene early in the film, as he examines his stomach, which is showing no signs of pregnancy.