there are no well-known figures named Margery and Tommen specifically mentioned in historical events, literature, or popular media with regards to a marriage or any other context. It is possible that these names refer to characters from a more recent work of fiction or a less widely known source.
If Margery and Tommen are characters from a book, TV show, movie, or any other fictional work released after 2023, I wouldn't have information about their ages at the time of marriage.
If you have more context or specific details about the work or story in which Margery and Tommen appear, I might be able to provide a more accurate response. Otherwise, I recommend looking up the specific source material or searching for information about these characters in a more recent database.