Mammootty is a Malayalam actor. The evidence provided does not specify who is in Mammootty, but it does mention Mammootty as a Malayalam actor. It appears that the question is asking about the composition or cast of a movie or project called “Mammootty,” but the evidence does not provide any information about the cast or crew of a project by that name. However, it does mention Mammootty as a Malayalam actor, suggesting that he may be the title character or subject of a project or movie called “Mammootty.” Without further information, it is not possible to determine who is in Mammootty.