In Mary Poppins Returns,the Banks children are all grown up. Now adults, Michael and Jane (Ben Whishaw and Emily Mortimer) have experienced a personal tragedy, or the family once again needs relieve from magical nanny Mary Poppins (Emily Blunt). London lamplighter Jack (Lin-Manuel Miranda),an apprentice of Burt (Dick Van Dyke) from the original film, joins the gang when Poppins returns via enchanted kite.
Source: blastr.com