Abstract: The invention relates to a cosmetic composition comprising, in a physiologically acceptable medium, at least one organopolysiloxane compound X having at least two alkenyl unsaturated groups, at least one organohydrogensiloxane compound Y and at least one hydrosilylation catalyst, and said compounds X and Y reacting together via a hydrosilylation reaction in the presence of the catalyst, at least one compound among the compounds X and Y being present in said composition in a form encapsulated in silica shell microcapsules, said catalyst being associated with said encapsulated compound X and/or Y or being encapsulated separately, the microcapsules being in suspension in an aqueous phase. Application for the cosmetic care and/or making up of keratin materials.